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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                 SCHEDULE 13G

                   Under the Securities Exchange Act of 1934
                               (Amendment No. )*

                          AECOM Technology Corporation
             -----------------------------------------------------
                                (Name of Issuer)

                                     Common
             -----------------------------------------------------
                         (Title of Class of Securities)

                                    00766T100
             -----------------------------------------------------
                                 (CUSIP Number)


Check the following box if a fee is being paid with this statement [ ].
(A fee is not required only if the filing person:  (1) has a previous statement
on file reporting beneficial ownership of more than five percent of the class
of securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).


Page 2 of 11 Pages Schedule 13G (continued) CUSIP No. 00766T100 - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Baron Capital Group, Inc. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES 100,000 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6 SHARED VOTING POWER EACH 5,407,822 REPORTING -------------------------------------------------------------- PERSON 7 SOLE DISPOSITIVE POWER WITH 100,000 -------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,609,822 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,709,822 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* HC, CO - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT

Page 3 of 11 Pages Schedule 13G (continued) CUSIP No. 00766T100 - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON BAMCO, Inc. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES 0 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6 SHARED VOTING POWER EACH 5,211,722 REPORTING -------------------------------------------------------------- PERSON 7 SOLE DISPOSITIVE POWER WITH 0 -------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,411,722 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,411,722 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA, CO - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT

Page 4 of 11 Pages Schedule 13G (continued) CUSIP No. 00766T100 - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Baron Capital Management, Inc. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES 100,000 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6 SHARED VOTING POWER EACH 196,100 REPORTING -------------------------------------------------------------- PERSON 7 SOLE DISPOSITIVE POWER WITH 100,000 -------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 198,100 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 298,100 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.3% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA, CO - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT

Page 5 of 11 Pages Schedule 13G (continued) CUSIP No. 00766T100 - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Ronald Baron - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION USA - -------------------------------------------------------------------------------- NUMBER OF 5 SOLE VOTING POWER SHARES 100,000 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6 SHARED VOTING POWER EACH 5,407,822 REPORTING -------------------------------------------------------------- PERSON 7 SOLE DISPOSITIVE POWER WITH 100,000 -------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 5,609,822 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,709,822 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* HC, IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT

Page 6 of 11 Pages Item 1. (a) Name of Issuer: AECOM Technology Corporation (b) Address of Issuer's Principal Executive Offices: 555 South Flower Street, Suite 3700 Los Angeles, CA 90071 Item 2. (a) Name of Persons Filing: Baron Capital Group, Inc. ("BCG") BAMCO, Inc. ("BAMCO") Baron Capital Management, Inc. ("BCM") Ronald Baron (b) Address of Principal Business Office: 767 Fifth Avenue New York, NY 10153 (c) Citizenship: BCG, BAMCO and BCM are New York corporations. Ronald Baron is a citizen of the United States. (d) Title of Class Securities: Common (e) CUSIP Number: 00766T100 Item 3. PERSONS FILING: BCG and Ronald Baron are: (g) Parent holding companies, in accordance with Section 240.13d-1(b)(ii)(G) BAMCO and BCM are: (e) Investment Advisers registered under Section 203 of the Investment Advisers Act of 1940 All persons filing are: (j) Group, in accordance with Rule 13d-1(b)(1)(ii)(J)

Page 7 of 11 Pages Item 4. OWNERSHIP^ (a) Amount Beneficially Owned as of December 31, 2007: BCG: 5,709,822 shares BAMCO: 5,411,722 shares BCM: 298,100 shares Ronald Baron: 5,709,822 shares (b) Percent of Class#: BCG: 5.7% BAMCO: 5.4% BCM: 0.3% Ronald Baron 5.7% ^BCG and Ronald Baron disclaim beneficial ownership of shares held by their controlled entities (or the investment advisory clients thereof) to the extent such shares are held by persons other than BCG and Ronald Baron. BAMCO and BCM disclaim beneficial ownership of shares held by their investment advisory clients to the extent such shares are held by persons other than BAMCO, BCM and their affiliates.

Page 8 of 11 Pages (c) Number of shares as to which such person has: (i) sole power to vote or direct the vote: BCG: 100,000 BAMCO: 0 BCM: 100,000 Ronald Baron: 100,000 (ii) shared power to vote or direct the vote: BCG: 5,407,822 BAMCO: 5,211,722 BCM: 196,100 Ronald Baron: 5,407,822 (iii) sole power to dispose or to direct the disposition of:* BCG: 100,000 BAMCO: 0 BCM: 100,000 Ronald Baron: 100,000 (iv) shared power to dispose or direct the disposition of:* BCG: 5,609,822 BAMCO: 5,411,722 BCM: 198,100 Ronald Baron: 5,609,822 Item 5. OWNERSHIP OF 5% OR LESS OF A CLASS Not applicable. Item 6. OWNERSHIP OF MORE THAN 5% ON BEHALF OF ANOTHER PERSON The advisory clients of BAMCO and BCM have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Issuer's common stock in their accounts. To the best of the Filing Persons' knowledge, no such person has such interest relating to more than 5% of the outstanding class of securities. Item 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY BAMCO and BCM are subsidiaries of BCG. Ronald Baron owns a controlling interest in BCG. Item 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP See Item 3. * By virtue of investment advisory agreements with their respective clients, BAMCO and BCM have been given the discretion to dispose or the disposition of the securities in the advisory accounts. All such discretionary agreements, are however, revocable.

Page 9 of 11 Pages Item 9. NOTICE OF DISSOLUTION OF GROUP Not applicable. Item 10. Certification By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February 7, 2008 Baron Capital Group, Inc., BAMCO, Inc., and Baron Capital Management, Inc. By: /s/ Ronald Baron _______________________________________ Ronald Baron, Chairman and CEO Ronald Baron, Individually By: /s/ Ronald Baron _______________________________________ Ronald Baron

Page 10 of 11 Pages Joint Filing Agreement The undersigned each hereby agree that the Schedule 13G dated February 7, 2008, which relates to the common stock of AECOM Technology Corporation to be filed jointly on behalf of each of them for the reasons stated therein, and any amendments thereto shall be filed jointly by the undersigned. Dated: February 7, 2008 Baron Capital Group, Inc., BAMCO, Inc., and Baron Capital Management, Inc. By: /s/ Ronald Baron _______________________________________ Ronald Baron, Chairman and CEO Ronald Baron, Individually By: /s/ Ronald Baron _______________________________________ Ronald Baron