Former CACI Executive Joins OPNET Technologies as Vice President of International Sales

WASHINGTON, DC -- June 27, 2000 -- OPNET Technologies, Inc., a developer of intelligent network management software, today announces that Joseph Lenz has joined the OPNET management team as vice president of international sales, bringing with him more than 20 years in the high-tech industry, including a four-year stint as president of simulation-software developer CACI Products Company.

"I'm excited to join a vibrant company such as OPNET during an important time in its evolution," said Lenz. "OPNET has highly regarded technology, a blue-chip clientele and a team of extremely capable and motivated people. I'm anxious to combine these ingredients with my own sales and management experience in the software industry to help OPNET enhance its international sales and service organization."

OPNET currently sells its intelligent network management software to customers in more than twenty countries on five continents. Its international client list includes British Telecom, DaimlerChrysler, Ericsson, France Telecom, Fujitsu, Siemens and Telstra. Mr. Lenz has been hired to expand OPNET's international presence and establish a world-class international service and support organization.

Prior to joining OPNET, Lenz spent 17 years at CACI in a variety of international business-development positions. He served as president of CACI Products from 1995 through 1999. Before his work at CACI, Lenz held several management and operations positions with technology leaders General Dynamics and SAIC. Lenz earned both a bachelor's degree and an MBA from the University of Wisconsin.

"Joe Lenz brings a wealth of experience and a track record of success in international business to OPNET's sales organization," said Marc Cohen, OPNET's Chief Executive Officer. "We're eager to apply his creativity and knowledge as we continue with our efforts to expand OPNET's sales and marketing infrastructure."

About OPNET Technologies, Inc.

The OPNET family of intelligent network management software enables our customers to optimize the performance and maximize the availability of communications networks and networked applications. The OPNET product suite combines predictive simulations and a comprehensive understanding of networking technologies to enable network professionals to more effectively design and deploy networks, diagnose network and application performance problems, and predict the impact of proposed network modifications.

The flagship products are: OPNET IT DecisionGuru, enabling service providers and enterprises to more effectively design and deploy networks and to predict the performance of their networks and applications; OPNET Modeler, enabling network equipment manufacturers to accelerate the design and development of network equipment and communication protocols; and OPNET Netbiz, accelerating the sales process for service providers and network-equipment manufacturers by automating network design and proposal generation. For more information, visit www.opnet.com.

###

Note to editors: The word OPNET is spelled with all upper-case letters.

OPNET Media Contact:
Margarita Castillo
OPNET Technologies, Inc.
(240) 497-3000
Media@opnet.com
www.opnet.com

OPNET Investor Relations:
Mel Wesley
OPNET Technologies
(240) 497-3000
ir@opnet.com
www.opnet.com