In April 2002, Wallace became an associate judge in the Circuit Court of Prince George's County, Maryland, and served in that role until his retirement in June 2023.
[12] After an extensive selection process, Wallace was chosen to serve a seven-year term (July 1, 2023 - June 30, 2030) as a full-time UNDT judge and is stationed in Nairobi, Kenya, where the UN has a major office.
[1] Before that time, from 1985 to 1988, Wallace was an associate attorney with the private law firm Knight, Manzi, Sothoron, Brennan & Ostrom, P.A.
[1] Wallace received his Bachelor of Arts degree from Hampden-Sydney College in 1982 and his Juris Doctor degree from the University of Maryland School of Law (now the University of Maryland Francis King Carey School of Law) in 1985.
[3][10] Wallace has held the following positions or received the following honors, among others, (as listed in the state of Maryland's on-line manual[1] among other sources);