He earned a Bachelor of Arts degree in theater and MFA in acting from the Theatre Conservatory at Roosevelt University.
After relocating to Vancouver, British Columbia, in 1999, Alcantar landed guest star or recurring roles on numerous shows, including Stargate SG-1, Dead Like Me, Da Vinci's Inquest, The Dead Zone, The Collector, Andromeda, Dark Angel, Millennium, Strange World, Honey I Shrunk the Kids, Just Deal, Cold Squad, Los Luchadores, The Outer Limits, and Breaking News.
Sever, The Charlie's Angels Story, Chestnut: Hero of Central Park, Hope Springs, Fantastic Four, His and Her Christmas and In the Land of Women.
[citation needed] He has worked as a dialect coach on the TV shows Fargo[4] and Fear the Walking Dead.
[5] In 2017, he played a minor role as the Mayor of Fillydelphia in the My Little Pony: Friendship Is Magic season seven episode "A Royal Problem".