James Slattin Martin Jr. (June 21, 1920 – April 14, 2002) was project manager for the Viking program.

[2] Martin joined NASA’s Langley Research Center in September 1964 as assistant project manager for Lunar Orbiter.

In recognition of his contribution to this project, Martin was awarded the NASA Exceptional Service Medal in 1967.

This role migrated to project manager for NASA's Viking Program for landing and orbiting Mars (1975–1982).

[4] The President called back three hours later at which time Martin, along with then-NASA Administrator Jim Fletcher, briefed him on the landing.