Department of the Navy, NAWCAD Contracts Competency Division, Villa Road, Bldg. 8110, St. Inigoes, Maryland 20684-0010

R -- ENGINEERING AND TECHNICAL SUPPORT SERVICES AND SUPPLIES TO SUPPORT THE RAPID DESIGN, DEVELOPMENT, INTEGRATION, TEST AND EVALUATION, INSTALLATION, FIELDING, CERTIFICATION, MANINTENANCE, LIFE CYCLE AND LOGISTICS SUPPORT OF ELECTRONIC COMMUNICATION SYSTEMS. SOL N00421-00-R-0189 DUE 071000 POC Josephine Scully, Contract Specialist, (301) 862-8117 or D. Mark Diehl, Contracting Officer, (301) 862-8690 E-MAIL: Click here to contact contract specialist via E-Mail, ScullyJA@navair.navy.mil. The purpose of this modification to the synopsis is to correct the estimated level of effort from 1,102,000 work-years to 1,102,000 man-hours. The solicitation will reside on the NAVAIR Home Page located on the the World Wide Web (WWW). The WWW server may be accessed using client browsers such as NETSCAPE and INTERNET EXPLORER. The WWW address for the NAVAIR Homepage is: http://www.navair.navy.mil.business/ecommerce/index.cfm. Also attached is a copy of the bidder list. BIDDER LIST FOR SOLICITATION N00421-00-R-0189 DynCorp PROSOFT 1272 W. Main Road 477 Viking Drive, Ste 400 Middleton, RI 02842 Virginia Beach, VA 23452 Bob Urso Ursula Rhodes 401-848-2267 757-431-2400 401-840-9360 FAX 757-463-1071 FAX uro@bbsnet.com rhodesu@prosoft-eng.com Large business Large business PB Inc. GRD, Inc. 4615 Hawkins Street N.E. 22188 Three Notch Road, Suite C Albuquerque, New Mexico 87109-4623 Lexington Park, MD 20653 Stephen Gammon Wendell Metcalf 505-345-1000 Ext. 119 301-863-7401 505-345-1010 FAX 301-863-6125 FAX sgammon@pbinm.com grd@us.hsanet.net Small business Small business Group 81 Incorporated Mandex, Inc 2800 Shirlington Road, Suite 802 12500 Fair Lakes Circle, Suite 300 Arlington, VA 2206 Fairfax, VA 22033-3804 Floyd Crisp Kevin M. Couch 703-671-8181 703-227-0924 703-671-9175 FAX 703-227-0929 FAX grp81@aol.com">grp81@aol.com/fcrispii@aol.com kcouch@mandex.com Small business Large business Information Systems & Networks Corporation C-Cubed Corporation 6945 Alamo downs Parkway 6800 Versar Center, Suite 300 San Antonio, TX 78238 Springfield, VA 22151 Susan M. Sucik Susanna Williams 210-523-2622 703-658-9685 Ext 371 210-523-0197 FAX 703-658-9689 isnsatx@flash.net susanna_williams@c-cubedcorp.com Small business Large business TranTech, Inc. INS, A Sytex Company 4900 seminary Road, suite 215 One Ivybrook Blvd., Ste. 140 Alexandria, VA 22311-1811 Ivyland, PA 18974 Philip C. Selz Bernice Chambers 703-671-9874 Ext 29 215-675-5110 Ext 1050 703-671-8484 FAX 215 675-5279 1-888-381-8877 phil_selz@trantech-inc.com bchambers@corp.i-n-s.com Small business Large business Federal Micro Systems, Inc. Innovative Concepts, Inc. 4201 Forbes Boulevard 8200 Greensboro Drive, Suite 801 Lanham, MD 20706-4340 McLean, VA 22012 Scheraine Stone Gregory Smith 301-731-0600 703-893-2007 Ext 271 301-731-9888 FAX 703-893-5890 FAX stone@fedmicrosyst.com gsmith@innocon.com Small business Small business Dynamics Research Corporation CENCOR 45370 Alton Lane, Suite 1 Suite 100, 5252 Cherokee Avenue California, MD 20619 Alexandria, VA 22314 Jim Gaul Donald J. Rowan 301-737-7699 703-941-5916 EXT 39 301-737-8837 FAX 703-941-4309 FAX Jgaul@drc.com drowan@cencor.com Large business Small business Veridian Engineering, Inc. Dataline, Inc. 22309 Exploration Drive 2551 Eltham Avenue, Suite O Lexington Park, MD 20653 Norfolk, VA 23513 Lisa Springer Lynn Carroll 301-863-4335 757-858-0613 EXT 175 301-862-2530 FAX 757-858-0606 FAX 757-343-6579 lsppringer@paxr.veridian.com lynn.carroll@data-line.com Large business Small business AMSEC LLC LB&B Associates Inc. 2829 Guardian lane 9891 Broken Land Parkway, Suite 400 Virginia Beach, VA 23452 Columbia, MD 21046 Thelma E. Buky James (Jay) R. Jackson 757-631-2327 301-596-2440 757-463-0680 FAX 301-596-7879 FAX thelma_buky@amsec.com jjackson@lbbassociates.com Large business Large business C-Cubed Corporation MaxFour Engineers and Architects 6800 Versar Center, Suite 300 851 E. Hughes Lane Springfield, VA 22151 Littleton, Colorado 80126 Peggy Field Kimberly C. Malek 703-658-9685 303-471-9288 703-685-9689 FAX 303-471-9284 FAX peggy_fieldc-cubedcorp.com kim@maxfour.com Large business Small business Telestar Corporation RF Microsystems, Inc. 1461 S. Balboa Avenue 2243 San Diego Avenue, Suite 200 Ontario, CA 91761 San Diego, CA 92110-2924 Frank H. Liu Ron File 909-923-6999 858-278-1300 909-923-6898 FAX 858-278-3030 FAX fliu@telestarcorporation.com rfile@rfmicrosystems.com Small business Large business Automation Precision Technology, LLC Nevada Automotive Test Center 945 Seahawk Circle P. O. Box 234 Virginia Beach, VA 23452 Carson city, NV 89702-0234 Joe Murphy Mike Dunn 757-499-6802 775-629-2000 757-499-3972 FAX 775-629-2029 FAX jmurphy@APT-LLC.com kpope@natac-ht.com Small business Small business Marconi Systems Technologies, Inc. Scientific Research Corporation 23481 Cottonwood Parkway 2300 Windy Ridge Parkway, Suite 400 South California, MD 20619 Atlanta, GA 30339 John Bergin Paul Mori 301-862-9328 301-863-0756 FAX john_bergin@tst.tracor.com pmori@scires.com Large business Large business VSE Corporation Harris Corporation 2550 Huntingdon Avenue P. O. Box 37 Alexandria, VA 22303-1499 Melbourne, FL 32902-0037 David W. Chivers Tom Milbourne 703-329-4652 321-727-4110 703-329-4348 321-727-6304 chivers_dave@vsecorp.com tmilbour@harris.com Large business Large business Scientific Research Corporation Electronic Site Services, Inc. 3860 Fabor Place Drive 121 Alsace Way North Charleston, SC 29405 Colorado Springs, CO 80906 Giles Fleming Michael S. Lowery 843-308-2510 719-650-1445 843-308-2536 FAX 719-632-8003 FAX gfleming@scires.com lowery@iex.net Large business Small business Hytech Industries Corporation Modern Technologies Corportion Suite 201, 634 Anchors Street Ft. Walton Beach, Fl 32548 Hector M. Guevara Chuck Presser 850-244-7665 850-244-7470 FAX Hboni27231@aol.com cpresser@arc.net Small business Large business Posted 06/15/00 (W-SN465183). (0167)

Loren Data Corp. http://www.ld.com (SYN# 0081 20000619\R-0012.SOL)