OS International Expands — The Reston-based company acquired Vykin Corporation, which specializes in communications, intelligence, and IT support to the intelligence community. The move is the company’s fourth acquisition in the past four years. [ExecutiveBiz]

LeaseAccelerator Acquires Australian Company — The Reston-based developer of enterprise lease accounting software acquiring Guardian Global Systems, which provides real estate administration software. [Potomac Tech Wire]

Summerbration Concert is Tonight — Cedar Creek offers a country performance with dance construction at Reston Station Plaza from 7-9 p.m. The concert is free and open for all ages. [Reston Community Center]

Photo via vantagehill/Flickr