From Wikipedia.
George Sears Greene (May 6, 1801 – January 28, 1899) was a civil engineer and a Union general during the American Civil War. He was part of the Greene family of Rhode Island, which had a record of distinguished military service to the United States. He first served in the Army from 1823 to 1836 after graduating second from his class at West Point. As a civilian, he was one of the founders of the American Society of Civil Engineers and Architects and was responsible for numerous railroads and aqueduct construction projects in the northeastern United States.
After 25 years as a civilian, he rejoined the Army to fight in the American Civil War. Despite his age, he quickly rose up the ranks and was appointed a brigadier general in early 1862. During the war, he took part in the Northern Virginia Campaign, the Battle of Antietam, and the Battle of Chancellorsville. His most notable contribution during the war was his defense of the Union right flank at Culp’s Hill during the Battle of Gettysburg. He returned to engineering work after the war until his death in 1899.
Bruce Geiger
Bruce Geiger, of Cornwall Furnace, Pennsylvania, is a retired HVAC specialist.