<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS OF WESTOWER CORPORATION FOR THE THREE AND
SIX-MONTH PERIOD ENDED AUGUST 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH DOCUMENTS.
</LEGEND>
<RESTATED>

<S>                             <C>                     <C>
<PERIOD-TYPE>                   6-MOS<F1>               6-MOS<F1>
<FISCAL-YEAR-END>                          FEB-28-1999             FEB-28-1997
<PERIOD-START>                             MAR-01-1998             MAR-01-1997
<PERIOD-END>                               AUG-31-1998             AUG-31-1997
<CASH>                                      13,236,000                 873,000
<SECURITIES>                                         0                       0
<RECEIVABLES>                                9,992,000               5,538,000
<ALLOWANCES>                                         0                       0
<INVENTORY>                                  1,723,000                 725,000
<CURRENT-ASSETS>                            30,807,000               9,446,000
<PP&E>                                       7,007,000               4,096,000
<DEPRECIATION>                               1,505,000               1,166,000
<TOTAL-ASSETS>                              53,699,000              12,735,000
<CURRENT-LIABILITIES>                       12,359,000               6,783,000
<BONDS>                                     15,156,000                 686,000
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                 150,000
<COMMON>                                        70,000                  48,000
<OTHER-SE>                                  25,940,000<F2>           5,068,000<F3>
<TOTAL-LIABILITY-AND-EQUITY>                53,699,000              12,735,000
<SALES>                                              0                       0
<TOTAL-REVENUES>                            23,384,000              17,402,000
<CGS>                                       17,604,000              13,047,000
<TOTAL-COSTS>                                        0                       0
<OTHER-EXPENSES>                             4,197,000               2,416,000
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                             448,000                  72,000
<INCOME-PRETAX>                              1,473,000               1,871,000
<INCOME-TAX>                                   324,000                 672,000
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                 1,149,000               1,199,000
<EPS-BASIC>                                     0.18                    0.25
<EPS-DILUTED>                                     0.15                    0.25
<FN>
<F1>The comparative financial information contained in this schedule has been
restated to reflect the October 28, 1997 merger with Western Telecom Contruction
Ltd., the May 29, 1998 merger with MJA Communications Corp., and the August 31,
1998 merger with Standby Services, Inc., all of which were accounted for as
poolings-of-interests.
<F2>Other equity of $25,940,000 at August 31, 1998 is comprised of Additional
paid-in Capital of $21,824,000, Accumulated Other Comprehensive Income of
$(468,000) and Retained Earnings of $4,584,000.
<F3>Other equity of $5,068,000 at August 31, 1997 is comprised of Additional
paid-in Capital of $(48,000), Accumulated Other Comprehensive Income of
$(125,000) and Retained Earnings of $5,241,000.
</FN>


</TABLE>