A man who was killed Monday when his motorcycle collided with a UPS truck at the entrance to Washington National Cathedral has been identified as a 28-year-old man who two months earlier completed a master’s program in business administration.

Geordan Glasgow Harris, who had an apartment in the District and a home in Maryland, will be remembered Thursday at a memorial Mass at Gonzaga College High School, from which he graduated in 2003 and where he was captain of the wrestling team.

D.C. police said the cause of the accident remains under investigation.

The crash occurred about 10 a.m. in the 3000 block of Wisconsin Avenue NW. Police said a southbound United Parcel Service truck was turning left into the cathedral’s driveway when it collided with a northbound Kawasaki Ninja motorcycle. Police said the motorcycle then hit a Chevrolet Avalanche sport-utility truck that was stopped in the southbound travel lane. Police have not said who was at fault.

Harris’s father, Bob Harris, said his son grew up in Montgomery County with a sister and a brother and attended Clemson University, graduating with a bachelor’s degree in business in 2007. He said his son interned at a construction company and then worked as development manager for a Washington builder of luxury apartments and offices.

Geordan Glasgow Harris (Courtesy of family)

Two years ago, Geordan Harris enrolled in a University of Maryland master’s program. He rented an apartment in downtown Washington, where the business school’s part-time MBA program is based, and took a full load of classes while working 50 hours a week. “He just wouldn’t sleep at night,” his father said. “He would work at his schoolwork all night long. He had incredible determination.”

He recently promised his brother that he’d run with him in the Marine Corps Marathon but didn’t have time to train. He ran and completed the race anyway, his father said.

Of his son’s life, Harris said, “It was short but intense.”

Geordan Harris completed the master’s program in May, his father said, and two weeks ago was elected to the board of directors of a nonprofit group that mentors D.C. youths kicked out of school because of criminal activity.

Jodi Ovca, the founder of the nonprofit, Access Youth, said a mutual friend asked Geordan Harris to help the small group out. He immediately helped put together a fundraiser, revamp the Web site and mentor children. He also persuaded his company to sponsor events.

“He was the kind of guy who jumps in and does anything and everything,” Ovca said. “He believed in our mission. He was always looking for a way to give back. If he had a second of extra time, he was going to learn something new.”

Geordan Harris was in the midst of updating the group’s Web site when he died, Ovca said. One of the tasks he didn’t get a chance to complete was adding his own name and biography to the list of the board of directors.