Revues:
Monday in the Dark With George (MAC and Bistro Awards for Outstanding Revue/ Bistro Award and MAC nomination for Outstanding Direction);Put On Your Saturday Suit - Words and Music by Jimmy Webb; Good Time City - The Songs of Lieber & Stoller; Sex Lies & Broadway Shows; 4 The Fun of It; It’s A Musical World - A Celebration of Leslie Bricusse; Operatically Speaking; The MAC Awards Show.

Solo acts:
Darius de Haas, Gerry Dieffenbach, Parker Scott, Andre de Shields, Trudi Mann, Michael King, Moira Danis and MAC Award winners Helen Baldassare, Esther Beckman, Georga Osborne, and Jim Luzar, among many others.

CDs:
Vocal Director & Co-Producer: BEAUTIFUL SOUNDS (Moira Danis), WITHIN THE HEART OF ME (Jeff Ide), MONDAY IN THE DARK WITH GEORGE (Original Cast Album), THE FACE OF MY LOVE (Ken Greves) and has worked on DAYDREAM (Darius de Haas), A NEW TAKE (Sue Matsuki) and COMPANY OF STRANGERS (Parker Scott). Liner Notes: LOVE DANCE (Vivian Lord), I WISH (Moira Danis), and NATURAL JAZZ (Frank Fontana).
 
Gerry has taught vocal performance at The New School and at the Helen Baldassare Cabaret Performance Workshop and conducts regular workshops in London and in Long Island (one of which is a much easier commute). As a columnist and critic, he has been featured in several national magazines and covered the cabaret and club scene in New York for over two decades. As a lyricist he has worked with composers Anthony Gaglione and Michael King and is currently working with the YouTube sensation, Perpetuum Jazzile and writer/ performer Scott Evan Davis. Gerry is also at work on his first novel, which has nothing whatever to do with directing or performing.