FLIR Systems said government systems president William Sundermeier resigned to pursue other business opportunities.
Thomas Surran, most recently president of the company's commercial systems division, was appointed COO and will assume responsibility for FLIR's global commercial and government operations.
Sundermeier has agreed to assist the company with the transition of his responsibilities through the end of February.
"I want to thank Bill for his tremendous contributions to FLIR," CEO Andy Teich said in a statement. ”He has been an instrumental part of FLIR's growth and evolution over the past 19 years, from his early days in product management through his leadership of our government systems business for the past eight years. We will miss his deep experience and perspective."
Surran first joined FLIR with the acquisition of Indigo Systems in 2004 and he served as general manager of the company's commercial vision systems business until 2007.
He rejoined the company in 2009 and has since held several roles, including vice president and general manager of Raymarine, a FLIR company.