He is known for his roles as personal presidential aide and Deputy Special Assistant to the Chief of Staff Charlie Young on the NBC drama television series The West Wing, for which he received an Emmy nomination for Outstanding Supporting Actor in a Drama Series, and pharmaceutical salesman–private detective Burton "Gus" Guster on the USA Network television comedy-drama Psych.

[4][5][6] He studied ballet at a young age, and appeared in the musical The Tap Dance Kid as Savion Glover's understudy on Broadway, a part he subsequently played on the show's national tour.

[7] Hill graduated from Sayreville War Memorial High School in 1993,[8] and studied business finance at Seton Hall University and acting at William Esper Studio.

When the music could not be found for his routine, telethon host Jerry Lewis helped by having the orchestra play another song while Hill performed.

In 1999, Hill was cast on The West Wing as Charlie Young, the personal aide to President Josiah Bartlet, who was played by Martin Sheen.

Hill also had roles in the 1999 film She's All That starring Freddie Prinze Jr. and Rachael Leigh Cook, both of whom he later reunited with on Psych, as a Los Angeles doctor named Owen in the movie.