[1] He attended the Massachusetts Institute of Technology where he earned Bachelors of Science degrees in Aeronautics and Astronautics (1991) and in Humanities, Music (1991).

He served as an electrical systems engineer on commercial communications satellite programs including IPSTAR, Europe*star, and Multi-Media Asia.

In JPL's Deep Space Mission Architectures Group he was the lead systems engineer for the GRAIL step 1 Discovery proposal and the ST9 Aerocapture[9] Phase A study for the New Millennium Program.

As the cross-cutting comain lead he led two multidisciplinary teams through the design, testing, and delivery of the core avionics, thermal, and communications systems flying on MSL.

[18] In addition to receiving a variety of NASA and JPL awards, Oh received a NASA Exceptional Achievement Medal in 2013 for the design, testing, and delivery of the core flight system functionality as the Cross-Cutting Domain Lead for MSL,[19] and the Korean Economic Institute's Recognition for Outstanding Contributions to the United States and Korean American community in science and technology in 2017.