Herman Haupt, an 1840's professor of mathematics and engineering at Gettysburg College (then Pennsylvania College) was featured as part of a Harrisburg Patriot-News series analyzing historically-important tombstones.
From the Patriot-News:
Prior to the Civil War, Haupt worked primarily in the railroad industry as an engineer designing bridges and tunnels. He patented a bridge construction technique known as the “Haupt Truss.” For most of the 1840’s, he was a professor of mathematics and engineering at Pennsylvania (now Gettysburg) College, before returning to the railroad industry.
Early in 1862, the second year of the Civil War, Secretary of War Edwin M. Stanton appointed Haupt chief of all U.S. military railroads and transportation. Haupt was known to show up at the war front or the White House at key points in the war — like at George McClellan’s headquarters just after the Second Battle of Bull Run, and at Joseph Hooker’s headquarters before Lee’s invasion of Maryland. Haupt also visited Fredericksburg shortly after the battle there in December 1862.