In 1983, Spencer started the hip hop group Numarx with Kevin Liles, Rodney "Kool Rod" Holloman, Darryl "Junie Jams" Mims, and Wayne Mallory.

[2] Later Spencer, Liles, and Holloman (along with Bill Pettaway and Ky Adeyemo) wrote "Girl You Know It's True",[3] which became a popular hit in German nightclubs and was eventually heard by Milli Vanilli producer Frank Farian.

[6] Spen also worked for several Baltimore-area-radio stations, including V-103, WERQ-FM "92Q", WKYS-FM, and WWIN-FM "Majic 95.9" (where he started the popular Flashback Saturday Night Dance Party).

[7] In 1989, Spen moved away from hip hop and joined the dance music production team The Basement Boys, who remixed or produced artists such as Paula Abdul, Michael Jackson, Crystal Waters, and Ultra Nate.

In 2018, Spen and Italian producer Michele Chiavarini scored a number 1 on Billboard's Dance Club Songs chart with their remix of Donna Summer's Hot Stuff.