About us

Belvedere Entertainment is centrally located in the San Fernando Valley. It is the brainchild of accomplished professional musicians Clayton Mathews and Jonathan Sosin. Their aim is to deliver a high-quality brand of entertainment to satisfy the demand for corporate and wedding clients. Fueled by a strategic partnership between the owners, management staff, and a select group of professional Los Angeles based performers, Belvedere Entertainment aspires to develop top-quality performance experiences in an extremely dynamic industry.


As a company, we understand that our clients require a commitment to exceptional business practices, as well as a passion for performance. Through research and innovation, we are constantly striving to increase our creative and qualitative value in the market. Belvedere aims to satisfy those demands above and beyond any and all of our clients expectations.

  • Jonathan Sosin

    Jonathan Sosin

    Jon Sosin is an accomplished session and live performance musician with over 15 years of experience in the professional music business. He has had the good fortune to work with some of the top producers, engineers and writers in the Los Angeles area and has toured nationally and internationally with platinum selling artists. His work can be heard on numerous nationally televised advertisements, as well as internationally released recordings by major label artists Alessia Cara, Lukas Graham, Andy Grammer, Melissa Etheridge, Meghan Trainor, Rachel Platten and many others. Jon has also performed on several major media platforms such as “Late Night with Seth Meyers”, “The Late Late Show with James Corden”, “Good Morning America”, and the “BBC Radio One Live Lounge”.

  • Clayton Mathews

    Clayton Mathews

    Clayton Mathews has developed a sound that covers a large area from bluegrass to jazz and even classical music. Clayton has recently performed to sold out crowds at Joe’s Pub in NYC, the 2009 Audio Engineering Society Convention at Flux Studios and performance series at Rockwood Music Hall with songwriter Will Knox. Clayton also graduated from Berklee College of Music with a degree in Music Production and Engineering and Violin Performance. The exposure has allowed the Indianapolis native to test his comfort playing different genres of music and allowed for more listeners to become accustomed to his sound.