Chip equipment maker MKS Instruments (MKSI 2.59%) has a new boss.

The Andover, Mass.-based maker of of instruments, subsystems, and process control solutions announced today that it had elected Gerald G. Colella to the position of chief executive officer, effective Jan. 1, following the retirement of Leo Berlinghieri. Colella currently serves as president and COO and had previously succeeded Berlinghieri as president in February. He has served as COO since 2010..

Noting his long working relationship with Colella at MKS, Berlinghieri said: "Jerry and I have worked together at MKS for nearly 31 years, and he has been a key contributor in our combined efforts to cultivate a company culture centered on success and delivering results. I have had a great 33 years at MKS, and will enjoy watching the company's growth and future successes with Jerry at the helm."

Colella joined MKS in 1983 and has served as MKS Instruments president and CFO since February 2013, after serving as VP and COO from January 2010 to February 2013, and as VP and chief business officer from April 2005 to January 2010. He previously served in various positions at PRG Products.