Clifford Moller died peacefully on Jan. 7 at his home in Cambridge. He was 99.

He born in Stratford, Conn., on April 29, 1921 to Joseph C. Moller and Anna C. Chapkovski. He served as a lieutenant in the Air Force during World War II. As an engineer and entrepreneur, he founded and led Precision Chemical Pump Corp. Later, he became a successful architect and developer.

A loving, compassionate and generous person, Cliff loved nature, especially water, and he relished swimming, sailing and ice skating. He was a humanitarian who promoted peace and was an active supporter of civil rights and a protester against the Vietnam War during the 1960s and 1970s; more recently, he advocated for nuclear disarmament. A longtime resident of Cambridge, he also traveled extensively and owned homes he built on Martha’s Vineyard and in the British Virgin Islands.

He is survived by his sons David and Jonathan; a daughter Nira Harper; three grandchildren and two great-grandchildren.

Services will be private.

Donations can be made to the Pine Street Inn in Boston or to the Martha’s Vineyard Land Bank.