Exhibit 99.3 URS CORPORATION Notice Of Guaranteed Delivery This form or one substantially equivalent to this form must be used to accept the offer (the "Exchange Offer") of URS Corporation to exchange an aggregate principal amount of up to $200,000,000 of its 12 1/4% Senior Subordinated Exchange Notes due 2009 (the "New Notes"), which have been registered under the Securities Act of 1933, as amended (the "Securities Act"), for a like principal amount of its issued and outstanding 12 1/4% Senior Subordinated Notes due 2009 (the "Old Notes"), which were issued in an offering under Rule 144A of the Securities Act that were not registered under the Securities Act. The Exchange Offer will expire at 5:00 p.m., New York City time, on September 16, 1999, unless extended (as it may be extended, the "Expiration Date"). As described in the enclosed Prospectus, dated August 18, 1999 (the "Prospectus"), if you are a registered holder of Old Notes and wish to tender your Old Notes, but (1) the certificates for Old Notes are not immediately available, (2) time will not permit your certificates for Old Notes or other required documents to reach Firstar Bank of Minnesota, N.A., as exchange agent (the "Exchange Agent"), before the Expiration Date or (3) the procedure for book-entry transfer cannot be completed before the Expiration Date, you may effect a tender of your Old Notes if (1) the tender is made through an Eligible Guarantor Institution (as defined in the Prospectus under the caption "The Exchange Offer--Procedures for Tendering Old Notes"); (2) prior to the Expiration Date, the Exchange Agent receives from an Eligible Guarantor Institution a properly completed and duly executed Notice of Guaranteed Delivery, substantially in this form, setting forth your name and address, and the amount of Old Notes you are tendering and stating that the tender is being made by Notice of Guaranteed Delivery. These documents may be sent by overnight courier, registered or certified mail or facsimile transmission. If you elect to use this procedure, you must also guarantee that within three New York Stock Exchange, Inc. ("NYSE") trading days after the date of execution of the Notice of Guaranteed Delivery, the certificates for all physically tendered Old Notes, in proper form for transfer, or a Book- Entry Confirmation (as defined in the Prospectus under the caption "The Exchange Offer--Procedures for Tendering Old Notes") of transfer of the Old Notes into the Exchange Agent's account at The Depository Trust Company (including the Agent's Message (as defined in the Prospectus under the caption "The Exchange Offer--Procedures for Tendering Old Notes") that forms a part of the Book-Entry Confirmation), as the case may be, a properly completed and duly executed Letter of Transmittal, with any required signature guarantees, and all other documents required by the Letter of Transmittal, will be deposited by the Eligible Guarantor Institution with the Exchange Agent; and (3) the Exchange Agent receives the certificates for all physically tendered Old Notes, in proper form for transfer, or a Book-Entry Confirmation of transfer of the Old Notes into the Exchange Agent's account at The Depository Trust Company, as the case may be, a properly completed and duly executed Letter of Transmittal, with any required signature guarantees, and all other required documents or, in the case of a Book-Entry Confirmation, a properly completed and duly executed Letter of Transmittal, with any required signature guarantees, or an Agent's Message instead of the Letter of Transmittal, in each case, within three NYSE trading days after the date of execution of this Notice of Guaranteed Delivery. Delivery to: Firstar Bank of Minnesota, N.A., Exchange Agent By Regular or Certified Mail: By Facsimile: By Overnight Courier or Hand: (Eligible Guarantor Institutions Only) Firstar Bank of Minnesota, N.A. Firstar Bank of Minnesota, N.A. Firstar Bank of Minnesota, N.A. 101 E. Fifth Street 101 E. Fifth Street 101 E. Fifth Street St. Paul, Minnesota 55101 St. Paul, Minnesota 55101 St. Paul, Minnesota 55101 Attention: Frank Leslie Attention: Frank Leslie Attention: Frank Leslie Fax: (651) 229-6415 To Confirm by Telephone or for Information Call: Firstar Bank of Minnesota, N.A. 101 E. Fifth Street St. Paul, Minnesota 55101 Attention: Frank Leslie Phone: (651) 229-2600 1 Delivery of a Letter of Transmittal or Agent's Message to an address other than the address listed above or transmission of instructions by facsimile other than as set forth above is not valid delivery of the Letter of Transmittal or Agent's Message. Ladies and Gentlemen: Subject to the terms and conditions set forth in the Prospectus and the accompanying Letter of Transmittal, the undersigned hereby tenders to URS Corporation the principal amount of Old Notes set forth below pursuant to the guaranteed delivery procedure described in the Prospectus under the caption "The Exchange Offer-- Guaranteed Delivery Procedures." - -------------------------------------------------------------------------------- Principal Amount of Old Notes If Old Notes will be delivered by Tendered:* book-entry transfer to The $____________________________________ Depository Trust Company, provide Certificate Nos. (if available): account number. _______________________________________ Account Number_______________________ Total Principal Amount Represented by Old Notes Certificate(s): $____________________________________ - ------------------------------------------------------------------------------- All authority herein conferred or agreed to be conferred shall survive the death or incapacity of the undersigned and every obligation of the undersigned hereunder shall be binding upon the heirs, personal representatives, successors and assigns of the undersigned. - ------------------------------------------------------------------------------- PLEASE SIGN HERE X ____________________________ ____________ X ____________________________ ____________ Signature(s) of Owner(s) Date or Authorized Signatory Area Code and Telephone Number: ( ) ------------- Must be signed by the holder(s) of Old Notes as their name(s) appear(s) on certificates for Old Notes or on a security position listing, or by person(s) authorized to become registered holder(s) by endorsement and documents transmitted with this Notice of Guaranteed Delivery. If signature is by a trustee, executor, administrator, guardian, attorney-in-fact, officer or other person acting in a fiduciary or representative capacity, such person must set forth his or her full title below. - -------- * Must be in denominations of principal amount of $1,000 and any integral multiple thereof. 2 Please print name(s) and address(es) Name(s): ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ Capacity: ___________________________________________________________________ Address(es): ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ GUARANTEE (Not to be used for signature guarantee) The undersigned, an Eligible Guarantor Institution, hereby guarantees that the certificates representing the principal amount of Old Notes tendered hereby in proper form for transfer, or timely confirmation of the book-entry transfer of such Old Notes into the Exchange Agent's account at The Depository Trust Company pursuant to the procedures set forth in the Prospectus under the caption "The Exchange Offer--Guaranteed Delivery Procedures," together with any required signature guarantee and any other documents required by the Letter of Transmittal, will be received by the Exchange Agent at the address set forth above, no later than three NYSE trading days after the Expiration Date. _____________________________________ _____________________________________ Name of Firm Authorized Signature _____________________________________ _____________________________________ Address Title _____________________________________ Name: _______________________________ Zip Code (Please Type or Print) Area Code and Tel. No. ______________ Dated: _______________________________ NOTE: DO NOT SEND CERTIFICATES FOR OLD NOTES WITH THIS FORM. CERTIFICATES FOR OLD NOTES SHOULD BE SENT ONLY WITH A COPY OF YOUR PREVIOUSLY EXECUTED LETTER OF TRANSMITTAL. 3