[5] Leon has been featured as a music artist on NPR's syndicated programs Morning Edition and All Things Considered in ten episodes between the years 2005 to 2018.

[21] Immediately following his completion of university, Leon worked on Days of Our Lives, garnering him an Emmy nomination for "Outstanding Music Director.

"[22] In 1994, Leon began working for New World, the parent company of Marvel at that time, as Music Director and composer on the TV series Valley of the Dolls.

[23] The following year (1995) was the start of his work for Marvel as composer and music supervisor on the show Spider-Man, along with other titles for Fox Kids.

[25] More recently, Leon performed and arranged songs for a series of albums on Vitamin Records by artists including Neil Young, The Cure, R.E.M.