He is known for his portrayal of Simon Tam in the science fiction television series Firefly and follow-up movie Serenity.

[3] After graduating from Byram Hills High School, Maher trained at New York University where he earned his drama degree in 1997.

[5] Maher starred as the title character, a rookie police officer, on the short-lived TV series Ryan Caulfield: Year One.

Maher was also cast as a chief resident in a hospital on the new series Halley's Comet.

He appeared in the 2005 Lifetime network movie The Dive From Clausen's Pier as Michelle Trachtenberg's new love interest.