Acentech (Cambridge, Mass.), an architectural acoustics, noise and vibration control, audiovisual, and technology consulting firm, has named Benjamin Markham as president. He succeeds Jeffrey Zapfe, who has served as the firm’s president since 2011.

Zapfe will continue as a principal, providing project leadership in the firm’s noise and vibration division.

Markham has been with the firm since 2002.

In addition, principals Jonah Sacks and Ioana Pieleanu have been promoted to directors of the firm’s architectural acoustics group in dual leadership roles.