Affiliate of UNICOM Systems, Inc. successfully completes tender offer for shares of GTSI Corp.

MISSION HILLS, CA and HERNDON, VA., June 18, 2012 – GTSI Corp. (NASDAQ: GTSI), a systems integration, solutions and services provider to government and UNICOM Systems, Inc. (“UNICOM”), a global information technology company and part of the UNICOM group of companies, today announced that UNICOM SUB ONE, Inc. (“UNICOM SUB ONE”), an affiliate of UNICOM, successfully completed its tender offer for the outstanding shares of common stock of GTSI for $7.75 per share in cash, without interest and less any applicable withholding taxes. The offering period expired at 12:00 Midnight, New York City time, on Friday, June 15, 2012. The depositary for the tender offer has advised that, as of the expiration time, 8,884,283 shares of GTSI common stock had been validly tendered and not withdrawn, including 75,135 shares that had been tendered pursuant to notices of guaranteed delivery, representing approximately 91.516% of the outstanding shares of GTSI. All such shares have been accepted for payment in accordance with the terms of the tender offer, including the shares that were tendered pursuant to notices of guaranteed delivery. UNICOM expects to effect a merger of UNICOM SUB ONE with and into GTSI without a vote or meeting of GTSI’s stockholders as soon as practicable. In the merger, each outstanding GTSI share not tendered and purchased in the offer (other than those as to which holders properly exercise dissenters rights, if any) will be converted into the right to receive the same $7.75 per share price, without interest and less any required withholding taxes, that was paid in the tender offer. As a result of the merger, GTSI will become a wholly owned subsidiary of UNICOM. Following the merger, GTSI’s common stock will cease to be traded on the NASDAQ Global Select Market.

Media Contact

Mr. Russ Guzzo
russ.guzzo@unicomglobal.com
+1.818.838.0606

About UNICOM Systems, Inc.

www.unicomsi.com

The UNICOM Systems technology division delivers world-class CICS automation and z/OS and z/VM software solutions to IBM Z customers globally, integration services and solutions to commercial and government organizations, and application development tools for Linux/Unix and Windows customers.

UNICOM's flagship product, AUTOMON/CICS, is an award winning solution which powers some of the largest CICS installations worldwide. Today UNICOM Systems offers dozens of mission-critical solutions for a variety of platforms in several categories including Performance Management, Application Lifecycle Management, Storage and Security Management, Application Development and Application Modernization.

About UNICOM® Global

www.unicomglobal.com

UNICOM Global consists of more than fifty (50) corporate entities encompassing a wide range of businesses across all geographic regions. With its corporate headquarters in Los Angeles, California, to offices in Illinois, Kentucky, Florida, Massachusetts, Maryland, Minnesota, New Hampshire, North Carolina, New Jersey, Texas and Virginia, throughout EMEA in the UK, Ireland, Germany, France, Italy, Spain, Denmark, Belgium, Switzerland and the UAE, and across Asia/Pacific with locations in Japan, China, India, Australia, Korea, Thailand, Taiwan and the Philippines.

UNICOM Global offers deep in-house resources and flexible IT solutions to our partners worldwide. UNICOM Global focuses on acquiring and integrating mature and growing mid-cap NASDAQ, London Stock Exchange AIM and German publically-traded companies in technology, financing, IT, real estate, and business services. Please visit our websites for additional information about the services, products and solutions that UNICOM Global offers:

UNICOM Global - Assets, capital and investment management
UNICOM Systems - IBM Mainframe software products
UNICOM Government (formerly NASDAQ: GTSI) - Government IT solutions
UNICOM Engineering (formerly NASDAQ: NEI) Appliance platform
UNICOM Science and Technology Parks
UNICOM Technology Park – Innovation Labs in Virginia
UNICOM Science and Technology Park – Innovation Labs in New Jersey
UNICOM Capital - Business and Financial Services
USRobotics - Data communications products
Memeo - Enterprise-grade Secure File Sharing for the Cloud
Firetide - Wireless technology solutions for security and transportation
DETEC - Document composition products
SoftLanding Systems - IBM i software products
Macro 4 (formerly LONDON: MAO) - Document Management products
illustro - z/OS and z/VSE software products
iET Solutions - ITIL® ITSM software products
Eden - Mergers & Acquisitions, Business & Financial Services, and Real Estate
CICS.com - Hardware, Software, Outsourcing and Professional Services

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