Jeffrey "Jeff" Kollman is an American guitarist and occasional bassist from Toledo, Ohio, best known for his work with Chad Smith's Bombastic Meatbats, Glenn Hughes, UFO offshoot Mogg/Way, progressive rock trio, Cosmosquad, and his 90s progressive metal band, Edwin Dare.

In addition to Cosmosquad and the Bombastic Meatbats, he is currently a member of the Alan Parsons Live Project, Asia feat. John Payne, as well as L.A. blues rockers Bleeding Harp and has toured and gigged with Japanese superstar Eikichi Yazawa, Foreigner's Lou Gramm, former Skid Row vocalist Sebastian Bach, the Michael Schenker Group, British rockers UFO, bassist Marco Mendoza and the Danny Seraphine led California Transit Authority (CTA), among others. He has also worked extensively with contemporary jazz keyboardist Lao Tizer.

Kollman has worked as a session guitarist, producer, songwriter, and actor. He has written music for movies and TV, including a commercial which ran during the 2007 Super Bowl. He is the owner and operator of Marmaduke Records, which has released the bulk of his albums. Kollman has been a Los Angeles resident since 1997 where he lives with his family.