David Monahan (born August 13, 1971) is an American actor who guest-starred in the NCIS Season 1 episode, Sub Rosa (episode) as eco-terrorist Sean Travis.

He also guest-starred in the NCIS: Los Angeles Season 1 episode, "Past Lives".

Monahan's partner is Larry Sullivan who played the Flight Surgeon in the NCIS Season 1 episode, High Seas (episode) and the couple have an adopted child together.

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