26. Sirius Computer Solutions
2016 Rank: 27
Top Executive: Joe Mertens, President & CEO
Location: San Antonio
The San Antonio-based systems integrator has over 4,000 professional and technical certifications among its staff of close to 2,000. The privately held firm said it took in $1.9 billion in sales in 2016, a two-year jump of more than 35 percent. Earlier this year, Sirius launched FiveOut, a digital agency that helps business transformation and customer engagement efforts.