Document:

<PAGE>

                                                                 Exhibit 10.1.21

                            BEACON POWER CORPORATION
                             WOBURN INDUSTRIAL PARK
                                 6D GILL STREET
                                WOBURN, MA 01801

January 6, 2000

Dr. Ricardo Farnes
TLER Associates

Dear Dr. Farnes,

Beacon Power Corporation (Beacon) is pleased to grant TLER Associates (TLER) the
right to distribute and sell Beacon's flywheel energy storage systems within
Mexico. Subject to the meeting of agreed upon performance objectives, TLER will
retain this right for a period of five years, which can be renewed by the joint
agreement of TLER and Beacon. Beacon can cancel this right if TLER does not meet
agreed upon performance objectives set annually. Beacon will provide TLER a
written notice of its intent to cancel and will give TLER 90 days to meet its
performance objectives. If TLER has not met its performance objectives within 90
days of notice, Beacon can at its sole option cancel TLER's right to distribute
and sell Beacon flywheel energy storage systems.

Sincerely,

/s/ William Stanton

William Stanton
President and CEO

cc: Maureen Lister
    John Doherty<PAGE>

                                                                    Exhibit 10.1

                  FIRST AMENDMENT made as of the 19th day of May, 2000 to the
Employment Agreement dated as of October 9, 1999 by and between Wilshire Real
Estate Investment Inc. and Wilshire Real Estate Partnership L.P. (together and
individually, the "Company"), and Robert G. Rosen (the "Executive"),

                              W I T N E S S E T H:

                  WHEREAS, the Company and the Executive have previously entered
into the Employment Agreement; and

                  WHEREAS, the Company and the Executive desire to amend the
Employment Agreement.

                  NOW, THEREFORE, the parties hereto agree as follows:

                  1. The Employment Agreement is amended effective as of the
date hereof as follows:

                  a. Section 1 of the Employment Agreement is amended by the
         deletion of the first sentence thereof and the substitution of the
         following sentence in lieu thereof:

                     "Except for earlier termination as provided in Section 7
                     hereof, Executive's employment under this Agreement shall
                     be for a term (the "Employment Term") commencing on October
                     9, 1999 (the "Commencement Date") and ending on October 31,
                     2000."

                  b. Section 2(c) of the Employment Agreement is amended in its
         entirety to read as follows:

                  "(c) During the Employment Term, Executive shall devote
                  substantially all of his business time ("Business Time"),
                  energy, skill and efforts to the performance of his duties and
                  responsibilities hereunder; provided, however, that Executive
                  shall be allowed to (i) engage in charitable activities and
                  (ii) manage his personal financial and legal affairs.
                  Executive shall perform his duties hereunder at the Company's
                  Portland, Oregon office (the "Portland Office") or the New
                  York Area Office (as defined below), at the Executive's
                  discretion; provided, however, that Executive shall spend at
                  least fifty percent (50%) of his Business Time in the Portland
                  Office unless otherwise agreed to in writing by the Company.
                  So long as the Company maintains its current Greenwich,
                  Connecticut office (the "New York Area Office"), the Company
                  shall provide Executive with private office space in such
                  office to be used by Executive when working from the New York
                  Area Office. Such office shall be provided to Executive,
                  beginning not later than July 1, 2000, as is, with

<PAGE>

                  existing furniture, telephone and data setup and shall remain
                  on a month-to-month lease. Notwithstanding the foregoing,
                  Executive, with the Company's prior written authorization
                  (which authorization shall be at the sole and absolute
                  discretion of the Company), may move the New York Area Office
                  to the New York City area; provided, that, the total monthly
                  cost for operating such office (including, but not limited to,
                  rent and utilities, but excluding, Bloomberg and other similar
                  systems to which Executive has access to in the Portland
                  Office and which are readily transportable) shall not exceed
                  $4,000."

                  c. Section 4 of the Employment Agreement is amended by (i)
         changing the date "September 30, 1999" where it appears in the first
         sentence of subsection (a) thereof to "October 1, 2000", (ii) deleting
         in their entirety, the last three sentences of the last paragraph of
         subsection (a) thereof, (iii) re-designating subsections (a), (b), (c),
         (d) and (e) thereof as subsections (b), (c), (d), (e) and (f) and (iv)
         adding a new subsection (a) to read as follows:

                  "(a) 1999-2000 Bonus. For the period commencing on the
                  Commencement Date and ending October 31, 2000 (the "Initial
                  Bonus Period"), Executive shall be eligible for a bonus (the
                  "Initial Period Bonus") in the amount of $368,004. The Initial
                  Period Bonus shall be paid to Executive upon materially
                  achieving, to the Company's satisfaction, a majority of the
                  Business Goals (as defined below) during the Initial Bonus
                  Period. For purposes of this Agreement, "Business Goals" shall
                  mean the (i) reduction or elimination of the liability risk
                  associated with short-term, mark-to-market financing for those
                  applicable assets, (ii) sale, upgrade of the ratings or
                  improvement of the marketability of some or all of the
                  Company's mortgage-backed securities, (iii) focus on and/or
                  implementation of a successful resolution strategy for the
                  Cityscape mortgage-backed securities position, (iv) completion
                  and closure of the "P.O." deal, subject to acceptable
                  structure, (v) exploration and provision of advice to the
                  Company on the process of launching a collateralized bond
                  obligation or other form of long-term financing or take-out
                  strategy for the mortgage-backed securities portfolio and (vi)
                  demonstration of the ability to functionally work fifty
                  percent (50%) of the time away from the Portland Office (as a
                  result of being based in the New York City Office and
                  traveling on behalf of the Company). Notwithstanding anything
                  in this Section 4(a) to the contrary (i) Sections 4(b) and
                  4(c) hereof shall not apply to the Initial Period Bonus and
                  (ii) Executive shall be entitled to retain the payments made
                  to him in the amounts of $112,500 and $29,496."

                                      -2-

<PAGE>

                  d. Section 5 of the Employment Agreement is amended by adding
         a new subsection (d) to the end thereof to read as follows:

                  "(d) Upon Executive's presentation of supporting
                  documentation, the Company shall reimburse Executive for the
                  reasonable moving expenses incurred by Executive in connection
                  with his move to the New York area in an amount not to exceed
                  $20,000."

                  e. Section 6 of the Employment Agreement is amended in its
         entirety to read as follows:

                  "6. Business Expenses. The Company shall also reimburse
                  Executive for the travel, entertainment and other business
                  expenses incurred by Executive in the performance of his
                  duties hereunder (including Executive's reasonable costs
                  associated with travel between the Portland Office and the New
                  York Area Office pursuant to Section 2(c) hereof), in
                  accordance with the Company's policies as in effect from time
                  to time."

                  f. Section 7(c) of the Employment Agreement is amended by
         adding the words "except as otherwise provided in Section 2(c) hereof,"
         to the beginning of clause (iii) thereof.

                  g. Clause (A)(i) of Section 8(c) of the Employment Agreement
         is amended in its entirety to read as follows:

                  "(i)(x) if Executive's employment is terminated on or after
                  November 1, 2000, the Estimated Annual Bonus payable to
                  Executive for the Annual Period, pro rated through the end of
                  the month in which the Executive is terminated and (y) if the
                  Executive's employment is terminated prior to November 1,
                  2000, one hundred percent (100%) of the Initial Period Bonus."

         2. As amended by this First Amendment, the Employment Agreement shall
remain in full force and effect.

                                      -3-
<PAGE>

                  IN WITNESS WHEREOF, the Company has caused this amendment to
be executed by its duly authorized officers and the Executive has hereunto set
his hand as of the date first above written.

                                       WILSHIRE REAL ESTATE INVESTMENT INC.

                                       By:    /s/ Andrew Wiederhorn
                                           -----------------------------------

                                             /s/ Robert G. Rosen
                                           -----------------------------------
                                                 Robert G. Rosen

                                      -4-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00013-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00013-of-00352.parquet"}]]