Williams will remain on the Chicago-based mid-market lender’s investment committee.
The appointment comes as part of a broader swath of changes in senior management.
The former BlueBay partner brings years of experience in private debt to the LP-focused business.
The firm’s sponsor coverage and asset management groups are under new leadership.
The hires are part of Carlyle’s plans to boost its credit opportunities business, which it said is a priority for growth.
ICG’s current head of Australia and New Zealand will take the lead across the Asia Pacific region.
Gordon Watters will bring 30 years’ experience to Triton’s debt investment arm.
The appointment of Adam Johnson to work alongside MidCap follows Apollo’s commitment to grow its credit business.
The Merrill Lynch veteran brings 30 years of experience to Star Mountain’s investment committee.
The New York-based credit manager promoted the former head of its energy debt platform, Dwight Scott, to president in June as part of the firm’s succession plan.