Deloitte, one of the world’s big four accounting firms, said it would acquire McColl Partners, a Charlotte-based boutique investment bank founded by former Bank of America chairman and CEO Hugh McColl Jr.

Terms of the sale were not disclosed. McColl, who stepped down from Bank of America in 2001 and founded his M&A advisory firm that same year, will now serve as a senior adviser to New York-based Deloitte. In a press release announcing the deal, Deloitte said the 70 professionals employed by McColl Partners will double the size of Deloitte Corporate Finance, a subsidiary of Deloitte Financial Advisory Services.