14. MULTIEMPLOYER, SINGLE EMPLOYER, AND 

JOINT EMPLOYER UNITS 

177-1642 et seq. 

420-9000 

As we have seen, Section 9(b) of the Act confers on the Board the duty to determine in each instance

whether “the unit appropriate for the purposes of collective bargaining shall be the employer unit craft unit,

plant unit, or subdivision thereof.’’ From an early date, the Board has construed “employer unit’’ to include 

multiemployer units, and joint-employer units. In some respects the tests for determining multiemployer and 

joint-employer status overlap although there are distinctions. Generally, a multiemployer situation is said to

exist when two or more employers band together for purposes of bargaining with the union for what would 

otherwise be separate units of the employees of each of the Employers. A “single employer’’ question

presents different considerations and is posed when “two nominally-separated entities are actually part of a 

single integrated enterprise.’’ Browning-Ferris Industries, 691 F.2d 1117, 1122 (3d Cir. 1982). In contrast, 

the term “joint employer’’ is usually applied to a situation where two or more employers share labor

relations control over a group of what would otherwise be one of the employer’s employees. This sharing is 

not necessarily for bargaining purposes. In fact, joint-employer issues arise often in unfair labor practice

cases. 

This chapter deals primarily with multiemployer bargaining units. The subjects of single- and jointemployer relationships and applicable unit principles are covered briefly.

14-100 Multiemployer Units 

420-9000 

440-5000 

530-8023 

The practice of multiemployer bargaining was known to Congress when it enacted the Taft-Hartley

amendments. The construction was given formal approval by the Supreme Court in NLRB v. Teamsters 

Local 449 (Buffalo Linen), 353 U.S. 87 (1957), when it stated that Congress “intended to leave to the 

Board’s specialized judgment the inevitable questions concerning multiemployer bargaining bound to arise 

in the future.’’ 

The question of the appropriateness of a bargaining unit comprising employees of more than one 

employer generally arises where employers in an industry have conducted collective-bargaining negotiations 

jointly as members of an association or are asserted to have delegated the power to bind themselves in

collective bargaining to a joint agent. Consideration is given to the history of collective bargaining, intent of 

the parties, the nature and character of the joint bargaining, the contract executed by the parties, whether

effective withdrawal from multiemployer bargaining had occurred, and other factors relevant to this

determination. See Maramount Corp., 310 NLRB 508 (1993), where the long history of collective 

bargaining was balanced against the employees’ Section 7 rights as evidenced by a series of petitions for

single units. 

Basically, in addressing itself to this standard to be applied in assessing the existence of a multiemployer 

bargaining, the Board looks for a sufficient indication from the history of the bargaining relationship

between the employers and the union of “intent to be governed by joint action.’’ Rock Springs Retail 

Merchants Assn., 188 NLRB 261 (1971). 

Determinations normally are made within the framework of a unit functioning either via an association

or under an informal understanding between otherwise unrelated employers. See Weyerhaeuser Co., 166 

NLRB 299, 300 (1967); Van Eerden Co., 154 NLRB 496 (1965). 

In Weyerhaeuser, the Board adverted to the fact that it had in the past found a multiemployer unit even

though the employers had never formalized themselves into an employer association, “a requirement the 

Board has never demanded,’’ and added that “substance rather than legalistic form is all the Board has ever 

149
150 MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS

required in multiemployer bargaining.’’ Thus, the emphasis is on intent to be bound by joint action as 

evidenced by objective, as distinguished from subjective, facts. Compare Accetta Millwork, 274 NLRB 141 

(1985), where the Board found no intent to be bound by group action. 

14-200 The General Rule 

420-9000 

440-1729-0133 

440-5033 

530-5700 

530-8023-9500 

The general rule is that a single-employer unit is presumptively appropriate. Thus, to establish a

contested claim for a broader unit, a controlling history of collective bargaining on a multiemployer basis 

must be shown. Central Transport, Inc., 328 NLRB 407 (1999); Chicago Metropolitan Home Builders 

Assn., 119 NLRB 1184 (1958); Cab Operating Corp., 153 NLRB 878, 879–880 (1965); Bennett Stone Co.,

139 NLRB 1422, 1424 (1962). See also Sands Point Nursing Home, 319 NLRB 390 (1995), and St. Luke’s

Hospital, 234 NLRB 130 (1978), where the Board found that the history of multiemployer bargaining

governed the scope of the unit. 

For examples of cases in which the Board found a bargaining history on a multiemployer basis, see 

Milwaukee Meat Packers Assn., 223 NLRB 922, 924 (1976); John Corbett Press Corp., 172 NLRB 1124 

(1968); B. Brody Seating Co., 167 NLRB 830 (1967); United Metal Trades Assn., 172 NLRB 410 (1968); 

Tom’s Monarch Laundry & Cleaning Co., 168 NLRB 217 (1968). Compare with Santa Barbara

Distributing Co., 172 NLRB 1665 (1968), in which the Board found a manifest failure of intention to

participate in a multiemployer unit. Similarly, in Walt’s Broiler, 270 NLRB 556 (1984), the employers

timely withdrew from multiemployer bargaining. The fact that they later used the same representative was 

not inconsistent with that withdrawal. 

As multiemployer bargaining is a voluntary agreement, dependent upon the real consent of the 

participants to bind themselves to each other for bargaining purposes, the “ultimate question . . . is the actual

intent of the parties.’’ Van Eerden Co., supra. Intent to be bound by joint bargaining is found where 

employers participate in meaningful multiemployer bargaining for a substantial period of time and there is a 

uniform adoption of the agreement resulting therefrom. Architectural Contractors Trade Assn., 343 NLRB 

No. 39 (2004); Arbor Construction Personnel, Inc., 343 NLRB No. 38 (2004); Krist Gradis, 121 NLRB 601 

(1958); Hi-Way Billboards, 191 NLRB 244 (1971). 

The intention of the parties to be bound in their collective bargaining by group rather than individual

action must be unequivocal. Hunts Point Recycling Corp., 301 NLRB 751 (1991); Kroger Co., 148 NLRB 

569 (1964); Morgan Linen Service, 131 NLRB 420 (1961); Artcraft Displays, 262 NLRB 1233 (1982). 

“The mere adoption of an areawide contract, which includes a ‘one unit’ clause” is not sufficient. See

Architectural Contractors, supra, and Arbor Construction, supra. 

Intent to become part of a multiemployer unit cannot be based solely on the adoption by an employer of 

a contract negotiated by a multiemployer association of which the employer was not a member. There must

also be evidence that the employer had authorized the association to negotiate on its behalf. Etna Equipment 

Co., 236 NLRB 1578 (1978). Moveable Partitions, 175 NLRB 915 (1969); Photographers of the Motion

Picture Industries, 197 NLRB 1187 (1972). In the latter, the evidence indicated that the so-called

independent employers did not in fact comprise a part of a single unit for bargaining. It was admitted that

these employers had the option to negotiate separately if they so desired; they could refuse to be bound by 

any agreement negotiated by any multiemployer group simply by not signing the resulting contract; it was 

not until they received the proposed agreement and discussed it that each individually decided whether to 

become a party to the agreement; and the association had not been authorized to negotiate on behalf of any 

of these. On this evidence, they were found not to be part of a multiemployer unit. Compare Custom Color 

Contractors, 226 NLRB 851 (1976). 
MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS 151

Intent is inferred from the conduct of the parties, not subjectively. Thus, when employers have banded 

together informally to bargain, without expressly documenting their relationship to each other or to the 

unions, the presence of the requisite intention is inferred from the facts. In these cases, a steady refrain runs

through Board rationales: meaningful joint bargaining, a substantial period of time, and adoption of uniform 

contracts resulting from the joint bargaining. American Publishing Corp., 121 NLRB 115 (1958). In the 

language of the Board, in Van Eerden Co., supra at 499: 

The ultimate question in these cases, however, is the actual intent of the parties, since multiemployer

bargaining is a voluntary arrangement, dependent upon the real consent of the participants to bind 

themselves to each other for bargaining purposes. And where there is specific evidence, beyond the

mere circumstances of joint negotiations and uniformity of contracts, indicating that the parties did not 

intend to accept the obligations and benefits of multiemployer bargaining, that evidence must be

equally considered in determining the basic issue. 

Thus, in American Publishing Corp., supra, the presentation of a joint position in bargaining and the

signing of the resulting contract as a single document by all participating employers was regarded as a

manifestation of the intent to be bound. But in Texas Cartage Co., 122 NLRB 999 (1959), mere adoption of 

an areawide agreement by an employer who never participated in group negotiations and never authorized 

any agent to negotiate on his behalf did not make the employer part of the multiemployer unit. See also 

Laundry Owners Assn. of Greater Cincinnati, 123 NLRB 543 (1959), and Ruan Transport Corp., 234

NLRB 241 (1978). 

An effective bargaining history or pattern, even though based on an informal organization of employers, 

may be sufficient to establish an appropriate multiemployer unit (Detroit News, 119 NLRB 345, 347–348 

(1958)), but the fact that the union voluntarily entered into initial negotiations with a new employer 

association, with no prior bargaining history and no existing multiemployer unit, and continued negotiations 

over a period of some months without reaching agreement was insufficient to establish a multiemployer unit

binding upon the union. Operating Engineers Local 701 (Cascade Employer), 132 NLRB 648 (1961). 

An employer group may be found to have engaged in joint bargaining even though the members of that 

group had no formal organization and even in the absence of an advance agreement to be bound by the 

negotiations. Belleville Employing Printers, 122 NLRB 350 (1959). Similarly, the retention by participating

employers of the right to approve or disapprove the agreement reached does not necessarily preclude a 

finding that a multiemployer unit is appropriate. Quality Limestone Products, 143 NLRB 589 (1963). 

Compare Rock Springs Retail Merchants Assn., supra. 

A multiemployer unit may be appropriate even though the employer has not specifically delegated to an

employer group the authority to represent it in collective bargaining or given the group the power to execute

final and binding agreements on its behalf. What is essential is that the employer member has indicated from 

the outset an intention to be bound in collective bargaining by group rather than by individual action. Kroger 

Co., supra. See also Bennett Stone Co., supra.

Fluctuating membership in a multiemployer group does not necessarily render the multiemployer unit 

inappropriate. Quality Limestone Products, supra at 591. 

The fact that an employer group includes employers who are members of an existing formal association, 

as well as employers who are not, is not relevant to the determination. American Publishing Corp., supra.

Similarly, a multiemployer unit may be appropriate even though some of the contracts have not been signed

by all members of the employer group. Kroger Co., supra. 

A finding that an effective multiemployer bargaining history exists is not precluded by the fact that joint 

negotiations are followed by the signing of individual uniform contracts, rather than by the execution of a

single document. Krist Gradis, supra; see also Belleville Employing Printers, supra. It is immaterial that the 

members of the employer group sign a joint agreement separately rather than delegate authority to sign to a 

joint representative. American Publishing Corp., supra. Nor is it decisive that, in addition to the joint 

agreement, there are local agreements in strictly local matters or that each employer in the group handles his 

own grievances. Evans Pipe Co., 121 NLRB 15 (1958). 
152 MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS

The exercise of a mutually recognized privilege to bargain individually on limited matters is not 

necessarily inconsistent with the concept of collective bargaining in a multiemployer unit. Kroger Co.,

supra. “Multiemployer bargaining does not altogether preclude demand for specialized treatment of special

problems; what is required, if an employer or a union is unwilling to be bound by a general settlement, is 

that the particularized demand be made early, unequivocally and persistently.’’ Genesco Inc. v. Clothing &

Textile Workers, 341 F.2d 482, 489 (2d Cir. 1966). 

Where the employer had, bargained collectively with the union on a multiemployer basis, for 17 years,

but, during and after the latest negotiations, had insisted that it would not agree to a contract which included 

a pension plan, such a reservation was found to be “nothing more than an exercise of the Employer’s 

privilege, acquiesced in by the Union, to insist upon limited separate negotiation, which privilege . . . is 

consistent with the concept of multiemployer bargaining.’’ Nor did the fact that in past bargaining limited

individual adjustments arose from apparently dozens of agreements, all of which were jointly negotiated, 

establish a future unequivocal intent not to be bound by group action generally. Kroger Co., supra at 574. 

The existence of a multiemployer agreement which establishes an administrative organization to speak 

for the employers, in such matters as the management of trusts and health and welfare funds, should not be 

construed as committing an employer to a multiemployer bargaining relationship, absent a clear intention to 

be so bound. Averill Plumbing Corp., 153 NLRB 1595 (1965). 

There is a distinction between an employer who is a member of a multiemployer bargaining unit and an 

employer who while not a member of that unit nonetheless agrees to sign the multiemployer agreement with

the union. HCL, Inc., 343 NLRB No. 95 (2004). 

14-300 Exceptions to the General Rule 

There are exceptions to the rule that controlling weight is accorded past bargaining history in

determining the appropriateness of multiemployer units. These are:

14-310 Agreement of the Parties 

420-7384 

Where an employer association and a union agree to proposed multiemployer bargaining, and no party 

seeks a single-employer unit, bargaining history is not a prerequisite to a finding that a multiemployer unit is

appropriate. Broward County Launderers Assn., 125 NLRB 256 (1960); Television Film Producers, 126 

NLRB 54 (1960). Compare Maramount Corp., 310 NLRB 508 (1993), where some employers had left the 

unit and the union filed petitions for separate units. 

14-320 Tainted Bargaining History 

420-1758 

420-9630 

A collective-bargaining history with a labor organization which has received illegal employer assistance

is not given any weight. Cavendish Record Mfg. Co., 124 NLRB 1161, 1169 (1959). 

14-330 Inconclusive Bargaining History 

420-1209 

420-1708 et seq. 

Where there is a dispute as to the appropriateness of a multiemployer unit, the following circumstances 

will militate against a finding that such unit is appropriate, even though there has been some bargaining with 

respect to it: The bargaining was preceded by a long history of single-employer bargaining; it was of 

relatively brief duration; it did not result in a written contract of any substantial duration; and it was not 

based on a Board unit finding. Chicago Home Builders Assn., 119 NLRB 1184, 1186 (1958).
MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS 153

14-340 Employees in Different Category 

420-1766 

420-2966 

A history of multiemployer bargaining for some employees does not preclude the establishment of a 

single unit of unrepresented employees in a different category. Macy’s San Francisco, 120 NLRB 69 

(1958). Compare St. Luke’s Hospital, 234 NLRB 130 (1978). 

14-350 The 8(f) Relationships-Construction Industry 

In Comtel Systems Technology, 305 NLRB 287 (1991), the Board held that the merger of 9(a) and 8(f)

bargaining units into a multiemployer unit does not convert the 8(f) relationship into a Section 9

relationship. 

14-360 Nonbeneficial Bargaining History 

Even a lengthy history of multiemployer bargaining may not be determinative if the Board concludes 

that the benefits and stability that have resulted from multiemployer bargaining have not been beneficial to

the unit employees. Maramount Corp., 310 NLRB 508, 511 (1993), and Burns Security Services, 257 NLRB 

387, 388 (1981). 

14-370 Brief Duration of Multiemployer Bargaining 

A brief history of multiemployer bargaining may be insufficient to rebut the presumption in favor of 

single employer units. West Lawrence Care Center, 305 NLRB 212, 217 (1991). See also section 9-560.

14-400 Employer Withdrawal From Multiemployer Bargaining 

420-9016 

440-5033-6080 

530-5770 

In the context of multiemployer units, a subject that regularly comes up for consideration is the question

of withdrawals from multiemployer bargaining and its impact on unit policy.

The general rule, axiomatic by its very nature, is that employees are not included in a multiemployer

bargaining unit if it is shown that their employer has effectively withdrawn from multiemployer bargaining. 

The “specific ground rules’’ governing withdrawal are set out in Retail Associates, 120 NLRB 388, 394

(1958). The Board observed that: 

The decision to withdraw must contemplate a sincere abandonment, with relative permanency, of the 

multiemployer unit and the embracement of a different course of bargaining on an individual-employer 

basis. The element of good faith is a necessary requirement in any such decision to withdraw, because 

of the unstabilizing and disrupting effect on multiemployer collective bargaining which would result if

such withdrawal were permitted to be lightly made. 

See also CTS, Inc., 340 NLRB No. 99 (2003). 

To implement these principles, the Board, beginning with Retail Associates, has promulgated criteria. 

These follow under several headings below. 

14-410 Adequate Timely Written Notice 

420-9016 et seq. 

530-5770 

530-8023 

Neither an employer nor a union may effectively withdraw from a duly established multiemployer 

bargaining unit except upon adequate written notice given prior to the date set by the contract for
154 MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS

modification, or the agreed-upon date to begin the multiemployer negotiations. Retail Associates, supra at

395; Milwaukee Meat Packers Assn., 223 NLRB 922, 924 (1976). 

14-420 Intent 

420-9016 et seq. 

440-5033-6020 

530-5784 

530-8023-3700 

The withdrawal from a multiemployer unit “must be shown as manifesting an unequivocal and timely

intention of withdrawing therefrom on a permanent basis.’’ B. Brody Seating Co., 167 NLRB 830 (1967). 

See also Walt’s Broiler, 270 NLRB 556, 557 (1984). For an instance of union effective withdrawal from a 

multiemployer bargaining unit, see Belleville News Democrat, 185 NLRB 1000 (1970). 

14-430 Where Actual Bargaining Had Begun 

530-5770-2550 et seq. 

530-8023 

Where actual bargaining negotiations based on the existing multiemployer unit have begun, the Board

will not permit, except on mutual consent, an abandonment of the unit upon which each party has committed

himself to the other, absent unusual circumstances. Retail Associates, supra at 395; Kroger Co., supra;

Sheridan Creations, Inc., 148 NLRB 1503 (1964), enfd. 357 F.2d 245 (2d Cir. 1966); Union Fish Co., 156 

NLRB 187 (1966); Los Angeles-Yuma Freight, 172 NLRB 328 (1968); Hi-Way Billboards, 191 NLRB 244 

(1971). 

An example of “unusual circumstances’’ may be found in U.S. Lingerie Corp., 170 NLRB 750 (1968). 

In that case, the following evidence was presented: (a) the employer withdrew from the association in order

to relocate away from the particular area; (b) it unsuccessfully sought help from the union in its effort to 

overcome the difficult economic straits it was in; (c) its status was that of “debtor in possession’’ under the 

bankruptcy laws; and (d) its intention to relocate the plant outside the area it was in raised issues “more

inherently amenable to resolution through collective bargaining confined to the parties immediately 

involved in the dispute rather than through collective bargaining on an associationwide basis.’’ The 

withdrawal in this case came at a time after the commencement of the latest round of bargaining. 

In Chel LaCort, 315 NLRB 1036 (1994), a Board majority rejected as an “unusual circumstances’’ 

exception situations where the multiemployers association fails, either deliberately or otherwise, to inform

its employer-members of the start of negotiations. Accord: D. A. Nolt, Inc., 340 NLRB No. 152 (2004), 

finding no secrecy or collusion concerning bargaining that was directed at respondent or employer members. 

Compare Plumbers Local 669 (Lexington Fire Protection Group), 318 NLRB 347 (1995), where a Board

majority found that furnishing a list of employers represented by the association was adequate notice of the

withdrawal of other employers from the association. The Chel LaCort principle was approved by the D.C.

Court of Appeals in Resort Nursing Home v. NLRB, 389 F.3d 1262 (D.C.Cir. 2004). 

A fragmented bargaining association that undermined the integrity of the multiemployer unit has been

found to be an unusual circumstance. Universal Enterprises, 291 NLRB 670 (1988). 

The Board has consistently rejected impasse as an “unusual circumstance’’ which would prompt 

withdrawal from multiemployer bargaining. Hi-Way Billboards, 206 NLRB 22 (1973); Charles D. Bonnano 

Linen Service v. NLRB, 454 U.S. 404 (1982). See also El Cerrito Mill & Lumber Co., 316 NLRB 1005

(1995). 

Compare Ice Cream Council, 145 NLRB 865, 870 (1964), where the Board approved withdrawal where 

there had been a “breakdown in negotiations leading to an impasse and a resultant strike.” 

In Atlas Transit Mix Corp., 323 NLRB 1144 (1997), the Board rejected as unsupported, the contention 

that unusual circumstances existed because the association did not represent the interests of the employer.

The employer relied on criminal proceedings against certain union officials. 
MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS 155

14-440 After Filing of Petition by Rival Union 

530-5770-2500 

530-8023-5000 

An attempted withdrawal from a multiemployer unit will be regarded as untimely and ineffective where 

it takes place after the filing of a petition by a rival union. “What we are doing,’’ the Board pointed out, “is 

fulfilling our statutory duty of determining what is an appropriate time for such withdrawal.’’ Dittler Bros., 

Inc., 132 NLRB 444, 446 (1961). 

In the Dittler case, the attempted withdrawal took place while the multiemployer association was 

negotiating a new multiemployer contract with the incumbent union. The Dittler rule does not apply where a 

multiemployer contract is still in effect and a substantial part of its duration still has to run. Ward Baking

Co., 139 NLRB 1344 (1962). 

14-450 Consent of the Union 

530-5770-3733 

530-8023-7500 

Withdrawal is permitted at an otherwise inappropriate time when the action has the consent, express or 

implied, of the union. Atlas Sheet Metal Works, 148 NLRB 27 (1964). 

In the Atlas case, the union not only concluded that the employer had withdrawn from multiemployer 

bargaining, but also acquiesced in the withdrawal. Its acquiescence was reflected both by its consent to 

bargain with the employer on a single-employer basis even after the association and the union had reached

an agreement and by conduct such as its willingness to bargain with other individual employers during an

impasse and its failure to present the association contract to the employer for signature. Atlas Sheet Metal 

Works, supra at 29. See also C & M Construction Co., 147 NLRB 843 (1964). 

Separate negotiations while reflecting union acquiescence and “unusual circumstances’’ may

nonetheless present an unfair labor practice issue if those negotiations amount to an untimely withdrawal

from group bargaining over the objections of the group. Olympia Auto Dealers Assn., 243 NLRB 1086

(1979). The Board will, however, permit interim agreements provided those agreements contemplate that the 

parties will execute the final agreement between the group and the union. Charles D. Bonnano Linen 

Service, 243 NLRB 1093, 1096 (1979), affd. 454 U.S. 404, 414 (1982). 

Whether the union has acquiesced in the withdrawal is a question of fact to be determined from an

examination of its conduct in the light of all the circumstances. As the Board stated in CTS, Inc., 340 NLRB 

No. 99 (2003), slip op. at 4 : 

Thus, a union may be found implicitly to have consented to or acquiesced in the attempted withdrawal,

where the totality of the union’s conduct toward that employer consists of a course of affirmative action

that is clearly antithetical to any claim that the employer has not withdrawn from multiemployer 

bargaining. I. C. Refrigeration Service, 200 NLRB 687, 689 (1972). In determining whether the union 

has consented or acquiesced to the employer’s withdrawal, a prime indicator is the union’s willingness 

to engage in individual bargaining with the employer that is seeking to abandon multiemployer 

bargaining. 

In Pepsi-Cola Bottling Co., 154 NLRB 490, 493 (1965). In this case, the union apparently recognized “a 

break from any possible past multiemployer association’’ when it met with a representative of one 

individual employer on the day following group bargaining and with another some time thereafter. 

Therefore, even if these individual employers had been members of a multiemployer association, the 

employers’ “timely requests for separate bargaining and the Union’s compliance with these requests clearly

establish that neither operation [employer] was a member of any multiemployer bargaining unit at the time 

the present petitions were filed.’’
156 MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS

14-460 Appropriate Unit After Withdrawal 

440-3325 

440-5033-6080 

530-8020-6000 

In one case, the Board found that, after withdrawal, the determination of the appropriate unit for the 

withdrawn employer’s employees is made on the basis of traditional unit considerations and not in relation 

to the history of bargaining on multiemployer basis. Albertson’s Inc., 270 NLRB 132 (1984). But this 

principle is applicable only when the grouping in the multiemployer unit would not otherwise be an

appropriate multifacility unit. Arrow Uniform Rental, 300 NLRB 246 (1990). 

In the construction industry an 8(f) relationship does not convert into a Section 9 relationship by virtue 

of merger into a matter employer unit. Accordingly, careful consideration must be given to the nature of the 

recognition in this industry. See Comtel Systems Technology, 305 NLRB 287 (1991). 

14-500 Single Employer 

177-1642 

401-7550 

420-2900 

The term “single employer’’ applies to situations where apparently separate entities operate as an

integrated enterprise in such a way that “for all purposes, there is in fact only a single employer.’’ NLRB v.

Browning-Ferris Industries, 691 F.2d 1117, 1122 (3d. Cir. 1982). Single-employer issues are not limited to 

representation questions. They may, for example, have primary/secondary implications in 8(b)(4) cases. 

The principal factors which the Board considers in determining whether the integration is sufficient for 

single-employer status are the extent of: 

(1) Interrelation of operations 

(2) Centralized control of labor relations 

(3) Common management 

(4) Common ownership or financial control 

See Radio Union Local 1264 v. Broadcast Service, 380 U.S. 255 (1965); South Prairie Construction Co.

v. Operating Engineers Local 627, 425 U.S. 800, 802 (1976); Mercy Hospital of Buffalo, 336 NLRB 1282 

(2001); Grass Valley Grocery Outlet, 332 NLRB 1449 (2000); and Mercy General Health Partners, 331 

NLRB 783 (2000); Centurion Auto Transport, 329 NLRB 394 (1999); Denart Coal Co., 315 NLRB 850

(1994); Blumenfeld Theatres Circuit, 240 NLRB 206, 215 (1979); Hydrolines, Inc., 305 NLRB 416 (1991), 

and Alexander Bistrikzky, 323 NLRB 524 (1997). 

The most critical of these factors is centralized control over labor relations. Common ownership, while

normally necessary, is not determinative in a single-employer status in the absence of such a centralized

policy. Grass Valley Grocery Outlet, supra; Mercy General Health Partners, supra; Western Union Corp., 

224 NLRB 274, 276 (1976); Alabama Metal Products, 280 NLRB 1090, 1095 (1986). Compare Dow

Chemical Co., 326 NLRB 288 (1998), rejecting single-employer status based on common ownership alone. 

For other cases presenting single-employer issues, see Soule Glass & Glazing Co., 246 NLRB 792

(1980), enfd. 652 F.2d 1055 (1st. Cir. 1981); George V. Hamilton, Inc., 289 NLRB 1335 (1988). See also

RBE Electronics of S.D., 320 NLRB 80 (1995); Francis Building Corp., 327 NLRB 485 (1998). 

A determination of single-employer status does not determine the appropriate bargaining unit. Thus, a 

single-employer analysis focuses on ownership, structure, and employer integrated control of separate 

corporations. Consideration of the scope of the unit examines employee community of interest. Peter Kiewit

Sons’ Co., 231 NLRB 76 (1977); Edenwal Construction Co., 294 NLRB 297 (1989). See also Lawson 

Mardon U.S.A., 332 NLRB 1282 (2000) (Board applies traditional presumption involving separate locations 

even in single-employer cases). 
MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS 157

14-600 Joint Employer 

177-1650 

420-7330 

530-4825-5000 

The distinction between single and joint employer is often blurred. In an excellent opinion, the Third 

Circuit described the distinction between these two concepts. NLRB v. Browning-Ferris Industries, supra at

1122. Thus, the court stated: 

In contrast, the “joint employer’’ concept does not depend upon the existence of a single integrated

enterprise and therefore the above-mentioned four factor standard is inapposite. Rather, a finding that 

companies are “joint employers’’ assumes in the first instance that companies are “what they appear to

be’’—independent legal entities that have merely “historically chosen to handle jointly . . . important

aspects of their employer-employee relationship.’’ Checker Cab Co. v. NLRB, 367 F.2d 692, 698 (6th

Cir. 1966). 

The existence of a joint-employer relationship is essentially a factual issue that depends on the control 

that one employer exercises over the labor relations of another employer. M. B. Sturgis, Inc., 331 NLRB 

1298 (2000); M.K. Parker Transport, 332 NLRB 547 (2000); Boire v. Greyhound Corp., 49 LC §18,830 

(D.C.Fla. 1964); Frostco Super Save Stores, 138 NLRB 125 (1962); Laerco Transportation & Warehouse, 

269 NLRB 324 (1984); TLI, Inc., 271 NLRB 798 (1984); O’Sullivan, Muckle, Kron Mortuary, 246 NLRB 

164 (1980); Lee Hospital, 300 NLRB 947 (1990). Rawson Contractors, 302 NLRB 782 (1991). See also G.

Wes Ltd. Co., 309 NLRB 225 (1992); Capitol EMI Music, 311 NLRB 997 (1993); Flatbush Manor Care 

Center, 313 NLRB 591 (1993); Brookdale Hospital Medical Center, 313 NLRB 592 (1993); and Executive

Cleaning Services, 315 NLRB 227 (1994). 

As noted earlier, joint-employer issues are usually presented in unfair labor practice cases. Where they 

do arise in a representation matter, i.e., who is the employer of the bargaining unit employees, the Board 

previously held that there must be a showing of employer consent, implied or actual, to the inclusion of 

employees other than its own in the unit. See Lee Hospital, supra, and Greenhoot, Inc., 205 NLRB 250 

(1973); Compare Quantum Resources Corp., 305 NLRB 759 (1991), in which the Board found joint 

employers in a representation case without a discussion of consent and Alexander Bistrikzky, 323 NLRB 524

(1997), supra, where the Board found the Lee/Greenhoot consent requirement inapposite because all the 

employees in the petitioned-for unit are employed by a single employer. 

In M. B. Sturgis, Inc., supra, the Board overruled Lee Hospital and clarified its Greenhoot holding. 

Specifically, the Board held that joint-employer consent is not required for a unit combining solely

employed user employees and jointly employed user/supplier employees. In Oakwood Care Center, 343

NLRB No. 76 (2004), the Board overruled Sturgis finding that such units are multiemployer units and 

require consent of the employer involved. 

There is a series of cases decided under M. B. Sturgis, Inc., supra, whose viability will have to be 

decided by the Board in future decisions. See Holiday Inn City, 332 NLRB 1246 (2000); Professional 

Facilities Management, 332 NLRB 345 (2000); and Engineered Storage, 334 NLRB 1063 (2001).

In Airborne Express, 338 NLRB 597 (2002), a Board majority rejected the suggestion of the dissenting

Member when she advocated that the Board revisit its joint-employer test because “business trends driven

by accelerating competition . . . may no longer fit economic realities. 

14-700 Alter Ego 

Alter ego is primarily an unfair labor practice concept that applies to situations in which the Board finds 

that what purports to be two separate employers are in fact and law one employer and that the employer is

not honoring its bargaining obligation. Two enterprises will be found to be alter egos where they “have 

substantially identical management, business purpose, operation, equipment, customers and supervision as
158 MULTIEMPLOYER, SINGLE EMPLOYER, AND JOINT EMPLOYER UNITS

well as ownership.’’ Denzel S. Alkire, 259 NLRB 1323, 1324 (1982); Advance Electric, 268 NLRB 1001, 

1002 (1984). As the Board noted in each of these cases, it is also relevant to consider whether the alleged

alter ego was created for the purpose of evading bargaining responsibilities. See also Crawford Door Sales 

Co., 226 NLRB 1144 (1976). Fallon-Williams, Inc., 336 NLRB 602 (2001) (motive relevant but not 

required for finding of alter ego); APF Carting, Inc., 336 NLRB 73 (2001); Dupont Dow Elastomers LLC,

332 NLRB 1071 (2001); NYP Acquisition Corp., 332 NLRB 1041 (2001). The Board will also consider alter 

ego allegations in representation proceedings. Elec-Comm, Inc., 298 NLRB 705 (1990). Accord: All County 

Electric Co., 332 NLRB 863 (2001) (also noting that Sec. 10(b) statute of limitations is not applicable to

representation cases). Note also that the Board divided on the issue of whether alter ego can appropriately 

be decided in an “R” case. 

In D & B Contracting Co., 305 NLRB 765 (1991), the Board declined to apply an alter ego bargaining

order to a unit that had been the subject of a Board election. Noting that the “employees freely decided in a

fair election that they did not want to be represeented by the Union,’’ the Board concluded that it would give 

“controlling weight to their rejection of representation’’ and dismissed the unfair labor practice complaint.

In one interesting case, the Board, as a consequence of court action, withdrew an earlier comment in

Gartner-Harf Co., 308 NLRB 531 (1992), that alter ego is a subset of single employer. In doing so, the 

Board noted that the two concepts are related, but separate. Johnstown Corp., 322 NLRB 818 (1997).

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