Gary Trimm, a veteran of more than 15 years in telecommunications, is taking over as president and chief executive officer of Concurrent Computer.

Concurrent, a developer of on-demand technology, will replace Jack Bryant on or before July 26. Bryant had served in those leadership roles since 2000.

Trimm comes to Concurrent from startup OpVista, which is working on optical transport systems. He also held several positions at Scientific-Atlanta in his career.

Concurrent also named Warren Neuburger as president of its integrated solutions division. Bryant had been acting head of that group.