[2] He graduated with a Bachelor of Science degree in electrical engineering from the Massachusetts Institute of Technology in 1961, where he was an active member of Sigma Alpha Epsilon (SAE).

[11] During Skylab 4, he was co-leader of the visual observations project and coordinator between the flight crew and the principal investigators for the solar science experiments.

This team was formed to investigate the potential of large-scale satellite power systems for terrestrial utility consumption and to make program recommendations to NASA Headquarters.

Lenoir supported the Space Shuttle program in the areas of orbit operations, training, extravehicular activity, and payload deployment and retrieval.

Lenoir resigned from NASA in September 1984, to assume a position with the management and technology consulting firm of Booz Allen Hamilton in Arlington, Virginia.

[12][14][15] Lenoir resigned from NASA again in April 1992,[16] to become vice president of the Applied Systems Division at Booz Allen Hamilton in Bethesda, Maryland.

[17] Two commercial communications satellites with Payload Assist Module upper stages (PAM-D) were successfully deployed from the Orbiter's cargo bay, a new first.

[21] The STS-5 crew successfully concluded the 5-day orbital flight of Columbia with the first entry and landing through a cloud deck to a hard-surface runway, demonstrating maximum braking.