Global design, architecture, engineering and planning firm HOK (St. Louis) has appointed Eli Hoisington and Susan Klumpp Williams as the firm’s new co-chief executive officers. They succeed Bill Hellmuth who passed away in April, shortly after his scheduled retirement.

Hoisington, design principal in St. Louis, and Klumpp Williams, managing principal in Washington, D.C., have served as interim co-CEOs since May 2022.

Going forward, they will work with HOK’s board to steer the firm’s design vision, business strategy, and operations.

Hoisington joined HOK in 2005 in New York and has worked on healthcare projects including NewYork Presbyterian Hospital’s David H. Koch Center in New York.

Klumpp Williams joined HOK’s Washington, D.C., office in 1985.