(written from a Production point of view)
Kelleher is born in the Bronx, New York, USA. He had recurring roles as Jim Steele in the science fiction series Dark Skies (1996-1997, with Jeri Ryan and Conor O'Farrell) and as NCIS Special Agent Christopher Pacci in five episodes of the television series NCIS: Naval Criminal Investigative Service (2004, 2011, and 2012).
Recent work includes guest roles in the television series In Plain Sight (2008), My Own Worst Enemy (2008, starring Christian Slater, Mädchen Amick, Alfre Woodard, James Cromwell, and with Louis Giambalvo), and Joss Whedon's Dollhouse (2009, with David Doty), the drama Flash of Genius (2008, with Daniel Roebuck and Bill Smitrovich), and the drama Seven Pounds (2008, with Bill Smitrovich, Gina Hecht, Andy Milder, Judyann Elder, Amanda Carlin, and Mark Newsom). Most recently, Kelleher had a guest role in an episode of J.J. Abrams' Fringe (2012, directed by David Straiton).