OTS provides services such as fuel tax reporting, driver log auditing and licensing, and will help expand DISA’s business into the transport sector.
The firm bought into DISA in January 2011 through its Riverside Capital Appreciation Fund V and Micro-Cap Fund II.
OTS is the second business Riverside has bolted-on to DISA following the purchase of South Texas Cost Containment in November 2012.
Riverside managing partner Loren Schlachet said, “We’ve been looking for opportunities to expand DISA in the transportation sector, and OTS is a wonderful fit.
“The company has a proven track record and a growing roster of satisfied customers.”
Riverside has made a strong start to 2013 by making a number of deals, including backing US medical technology company Stinger Medical and military training company Bohemia.
Last week it emerged the firm had hit the halfway mark for its sixth North American buyout fund, which is targeting $1.2bn.
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