Stephen Z. Schwartz, of Silver Spring, passed away on Dec. 30, at age 89. He was a graduate of City College of New York and an engineer. He is survived by his children, David (Shelly) Schwartz and Barry (Lisa) Schwartz; and grandchildren, Marissa, Deanna and Russell Schwartz. He is also survived by many loving nieces, nephews and dear friends. He was predeceased by his loving wife, Deborah Schwartz (nee Stiefel), his parents, William and Elizabeth Schwartz, and his older brother, Alexander Schwartz. Contributions may be sent to MoveOn.org. Services provided by Sol Levinson & Bros.