CohnReznick LLP is a national professional services firm headquartered in New York, NY. It is the tenth largest public accounting firm in the United States based on aggregated 2013 revenues.The Firm’s services are aligned in three segments: accounting, tax, and advisory. It has 26 offices, 2,500 employees as of May 1, 2014, and reported annual revenue of $508 million (for fiscal year ending 1/31/14). CohnReznick was formed in 2012 through a combination of two firms J.H.