Mark R. Letzkus, 54, an analyst and project manager for Exxon Mobil in Fairfax County, died Feb. 15 at Inova Alexandria Hospital.

He had sepsis, said his brother Steve Letzkus.

Mr. Letzkus had worked for Exxon Mobil for about the past 15 years and previously was a residential real estate agent with Re/Max. He was an Alexandria resident.

Mark Richard Letzkus was born in the District and grew up in Falls Church. He was a 1976 graduate of Falls Church High School.

Survivors include his father and stepmother, Donald R. Letzkus and Pat Letzkus of Alexandria; three sisters, Janet Letzkus Woolf of Springfield, Mary Letzkus of Burke and Judy Letzkus Myers of Sanford, Fla.; and three brothers, Steve Letzkus of Charlottesville, Mike Letzkus of Sanford and Brian Letzkus of Burke.

— Emily Langer