OPNET Technologies, Inc. is a software business that provides performance analysis for computer networks and applications.

The company was founded in 1986 and went public in 2000. It is headquartered in Bethesda, Maryland

Bethesda, Maryland

Bethesda is a census designated place in southern Montgomery County, Maryland, United States, just northwest of Washington, D.C. It takes its name from a local church, the Bethesda Meeting House , which in turn took its name from Jerusalem's Pool of Bethesda...

 and has offices in Cary, North Carolina; Nashua, New Hampshire; Dallas, Texas; and Santa Clara, California. It has international offices in Slough, United Kingdom; Paris, France; Ghent, Belgium; Frankfurt, Germany; and Singapore with staff and consultants in multiple locations in Asia and Latin America.
"OPNET" was Alain Cohen's (co-founder and current CTO & President) graduate project for a networking course while he was at MIT.