Ferrer also performed voice acting in animated projects, including Shan Yu in Mulan (1998), Tarakudo on Jackie Chan Adventures (2000–2005), and Vandal Savage in Young Justice (2010–2012).

[2] Ferrer's siblings were sisters Maria and Monsita, and brothers Gabriel (later the husband of singer Debby Boone) and actor Rafael.

[7] Sharing a love of comics Ferrer and Mumy co-created Comet Man and Trypto the Acid Dog plus co-wrote the Marvel Graphic Novel The Dreamwalker.

In 1984, he directed the Mark Medoff play “When Ya Coming Back, Red Ryder?” at the Coconut Grove Playhouse in Miami, Florida.

Ferrer's notable later roles include a sinister biker in Valentino Returns, an overzealous engineer in DeepStar Six (1989), a resourceful vigilante in Revenge (1990), Commander Arvid Harbinger in the comedy Hot Shots!

Todd Spurrier in Shannon's Deal (1989–1991), as Cajun cop Beau Jack Bowman in Broken Badges (1990–1991), and as cynical, wittily abrasive FBI forensics specialist Albert Rosenfield in Twin Peaks (1990–91).

Later in the same year, he provided the voice for a similar character, the Weather Wizard, in the Superman: The Animated Series episode "Speed Demons".

The same year, at the 41st Grammy Awards, Ferrer was nominated for "Best Spoken Word Album for Children" in Disney's The Lion King II, "Simba's Pride Read-Along."

He was also the protagonist of the American rock band Toto's music video for the song "I Will Remember", appearing alongside actor Edward James Olmos.

Signed to a recurring role in NCIS: Los Angeles as Naval Criminal Investigative Service Assistant Director Owen Granger, Ferrer was promoted to a series regular for the fifth season on February 6, 2013.

[14] Miguel O'Hara, the alter ego of the Marvel Comics superhero Spider-Man 2099, was named after Ferrer by his friend, writer Peter David, who co-created the character.