Larry quickly rose to share the A & R responsibilities as composer/producer at Columbia Records. Shortly thereafter, Jerry Moss and Herb Alpert asked Larry to join them at their fledgling start-up label, A & M Records. Among his many production credits is "The Gilded Palace of Sin" by The Flying Burrito Brothers, which was chosen as # 192 on The Rolling Stones' 500 Greatest Albums of All Time. In 1970, Larry formed Artisan Lodge to produce music and film. He produced a variety of artists from Jimmy Webb to Helen Reddy's first hit albums for Capitol Records. During this period, he helped grow Acoustic Control Corp., a company founded by Larry and family members, that manufactured solid state musical instrument amplifiers. With a capital investment from Elektra Records, Acoustic would quickly grow to be a 10 million dollar company and remain a leader in the field for many years to come. When Steve Ross acquired Warner Brothers Studios, Mo Ostin, legendary Chairman of Warner Bros. Records, recommended Larry join Warner Bros. as Head of Music for Motion Picture and Television. He was quickly elevated to Vice President Production Motion Pictures.

In 1980 he joined Ray Stark to become Senior Vice President, Motion Pictures of Rastar Pictures. Prior to becoming a co-founder of Boxstar Records, Larry was founder and President of Marks Management, representing composers for blockbuster films such as Forest Gump, Back to the Future, Who Framed Roger Rabbit, and The Bodyguard. Larry attended the University of Southern California before completing graduate studies at The Juilliard School of Music in New York.