The Associated Builders and Contractors has hired Gregory E. Sizemore as vice president of environment, health, safety and workforce development for the 21,000-member national open-shop group. He was senior manager of craft development at Zachry Industrial.

Gregory E. Sizemore

Gregory L. Sizemore, no relation, remains executive vice president of the Construction Users Roundtable, a Cincinnati-based owners group.

Michael A. Shamma has joined engineer HAKS, New York City, as president. He was chief engineer of the New York State Thruway Authority/Canal Corp. and a regional state transportation director.

AECOM has named Jess Yoder vice president in San Francisco and CM-PM director of its Americas water unit. He was a Parsons Corp. senior VP. Carla Christofferson now is the firm’s executive vice president in Los Angeles and general counsel.