Michael Johnson has been promoted to co-CEO at Gurtin Fixed Income Management LLC, , an investment management firm based in San Diego and Chicago that specializes in municipal bond portfolios for high- and ultra-high-net-worth individuals.

The position will be shared with founder Bill Gurtin, who will continue as CEO and chief investment officer.

As co-CEO, and while continuing to serve in the capacity of chief risk officer, Johnson will be responsible for the firm’s day-to-day management and all firm-level risk management.