George Aloysius Petrello, 68, an occupational health and safety manager who helped develop an integrated safety and fire prevention management system at the Pentagon, died of cancer Oct. 29 at Doctors Community Hospital in Lanham. He lived in Bowie.

Mr. Petrello had worked at the Pentagon for the past 27 years, most recently for the Defense Facilities Directorate of the Washington Headquarters Services.

He was born in Washington and raised in what is now Hyattsville. He was a 1955 graduate of Bladensburg High School.

After working at his father's fence company, he joined the Navy Reserve and served a few years as a D.C. police officer.

In later years, he was a fourth-degree member of the Knights of Columbus and a founder of the Knights of the Clown Table, a group of volunteers who marched in parades, made animal balloons and visited children in hospitals.

He played the piano and the accordion, enjoyed gardening (especially roses), and donated 96 pints of blood to the American Red Cross in his lifetime.

His marriages to Nancy McConnell Petrello and Anna Catherine "Cathy" Barthel Petrello ended in divorce.

Survivors include his companion, Alice Stewart of Bowie; four children from his first marriage, Timothy Petrello of Oak Harbor, Wash., Joseph Petrello of Waitsburg, Wash., and Anna Christen and Marie Petrello, both of Walla Walla, Wash.; a daughter from his second marriage, Angela Petrello of Bowie; a sister; and eight grandchildren.