Thomas McMackin

Thomas McMackin, Senior Vice President, General Manager

Tom McMackin joined SS&C in 2005 when the company acquired Open Information Systems (OIS), where he was Chairman and CEO. He founded OIS in 1994 after holding several senior positions at Citibank in the World Wide Securities Services and Financial Institutions groups. At OIS, Mr. McMackin established the company as a leader in providing technology-based products to the world's foremost financial institutions, and achieved over 75% market share in a $200 billion average daily business.