The Brooklyn Park resident was 66.
Mr. Sisk was born in Baltimore and raised near Patterson Park. He attended city public schools and after enlisting in the Army in 1964, her earned his General Educational Development certificate.
Mr. Sisk completed two tours of duty in Vietnam, where he worked in communications. He was discharged in 1968.
He worked as a bread deliveryman and for a family-owned produce business while attending night school at what is now Loyola University Maryland, where he earned a degree in accounting.
From the late 1970s until 1992, Mr. Sisk was an accountant for Mercantile-Safe Deposit & Trust Co. Until retiring in 2008, he was a bookkeeper for several businesses.
The former Millersville and Highlandtown resident was a fan of 1950s and 1960s popular and rock music. He also enjoyed crossword and Sudoku puzzles and following the Orioles and Ravens.
There are no services.
Surviving are a son, Jonathan Sisk of Pasadena; a daughter, Dawn Eichelberger of Pasadena; two brothers, Tom Sisk of Baltimore and Chuck Sisk of Canton; a sister, Pat Stephens of Dundalk; four grandchildren; and many nieces and nephews. His marriage of 33 years to the former Eileen Zadroga ended in divorce.