Ballentine Partners, the Waltham, MA-based wealth management firm, has named William Braman as chief investment officer.

Braman has 30 years of experience in the asset management industry. At Ballentine, he will lead an investment team which oversees around $6.5 billion in assets under advisement, spread across traditional investments, hedge funds and private equity.

Before joining Ballentine, he was chief executive of Fortis Investment Management USA, until its recent acquisition by BNP Paribas. Prior to that, he was CIO at John Hancock Advisers, and at Baring Asset Management before that.

Ballentine Partners has clients in the US, Canada and Europe. Its family office division serves families with assets of at least $20 million.