He also held senior leadership positions at EY, Mediachase and PwC.
Carter Wood, who served as chief financial officer at Buchanan & Edwards between 2010 and 2015, has returned to the company to serve in the same capacity.
Wood is a nearly two-decade accounting and finance professional who previously served as director of financial reporting at Cognosante. He also held senior accounting roles at CGI (NYSE: GIB) and Deloitte.
Brian Karlisch, co-founder and board chairman at Buchanan & Edwards, said the leadership team looks forward to working with Olson and Wood to help the company advance growth efforts and expand technology platforms for government clients.