In 2005, he was named Oil Man of the Year by the Oil & Heat Institute of Eastern New York, becoming the first non-owner to be presented with this honor.
Brennan was an avid skier, belonging to many organizations including, the Single Ski Club, Albany Ski Club, New York Capital District Ski Council and the National Ski Patrol. He was also an alpine course judge during the 1980 Winter Olympics in Lake Placid. Brennan was also a member of the Johnny Evers Golf League at Western Turnpike for more than 40 years.
He is survived by his beloved wife of 50 years, Susan Doyle Brennan; and his daughters, Tracylynn (David) Patterson and Lisa Leigh (Jeffrey) Anderson; and his cherished grandchildren, Janelle Lynn Patterson, Kristopher Patterson, Thomas Anderson and Erin Anderson. He is also survived by his siblings, Bernice DeSerto, Patrick Brennan, Karen Decker, Paul Brennan, Marta Lang, John Brennan, Judy Mulford, Ralph Brennan, and Charles Brennan. Edward was predeceased by his siblings, Marie Brennan, Anna Drumm, Frances King, Donald Brennan, Margaret Christiansen, and Elizabeth Brennan.