I think the best Confederate Engineer in my opinion was E. P. Alexander who would rise through the ranks to become a General.
Name ALEXANDER, Edward Porter
Born May 26 1835, Washington GA
Died April 28 1910, Savannah GA
Pre-War Profession Graduated West Point 1857, instructor at West Point, Utah expedition.
War Service June 1861 Capt. of Engineers, signal officer at First Manassas, Lt. Col. and chief of ordnance of ANV, December 1862 Col., chief of artillery in Longstreet's Corps, Chancellorsville, Gettysburg, Knoxville, February 1864 Brig. Gen., Spotsylvania, Cold Harbor, Petersburg (w), Appomattox.
Post War Career Professor of Engineering, railroad president, wrote memoirs.
Notes Commanded the barrage before Pickett's charge
Further reading
Alexander, E. Porter Fighting for the Confederacy : the personal recollections of General Edward Porter Alexander, edited by Gary W. Gallagher. Chapel Hill, University of North Carolina Press, c1989
Alexander, E. Porter Military memoirs of a Confederate : a critical narrative. New York, Da Capo Press, 1993 Golay, Michael To Gettysburg and beyond : the parallel lives of Joshua Lawrence Chamberlain and Edward Porter Alexander. New York, Crown Publishers, c1994
Klein, Maury Edward Porter Alexander. Athens GA, University of Georgia Press 1971
Researching the First Battle of Manassas/Bull Run; it was E. P. Alexander that was key to where the U.S. Marines progressed throughout the battle and mentioned them as prisoners. Knowing he was attached to Beauregard, he would be in the vicinity of Headquarters and relaying.
He also was very good at the Gettysburg campaign and, in my personal opinion was sabotaged by General Wm. Pendleton, as Pendleton moved Alexander's ordnance trains; when Alexander was in charge of all of the guns affixed on the clump of trees that General Pickett's attack was to take place--which in turn sabotaged Longstreet's plan for heavy bombardment to continue until the charge got closer to the wall in support of the charge. But, as a Colonel at the time General Pendleton's wishes over rode Alexander's.
Another excellent engineer, Captain Boswell who was killed when riding with General T. J. "Stonewall" Jackson, when Jackson was wounded severely.
There were many 'engineers' that were excellent for both sides.
Just some thoughts.
Respectfully submitted for consideration,
M. E. Wolf