Our Team

Voted Best of the VI for 10 years running (2010-2019)!!




Mathayom Vacharat is the owner and head chef at Mathayom Private Chefs and St. John Catering and has been a resident of St. John since 1995, moving from Philadelphia after graduating Drexel University with a Business degree. Mat then attended the Graduate Program at the School of Hard Knocks, studying Improvisation.  Opening the business in 2004, his experience as executive chef at premier fine dining restaurants on St. John lends his cuisine a breadth of influences ranging from Asian fusion to progressive American to Caribbean flair.

Mat is committed to sourcing fresh local product as he and his team of talented chefs create custom menus based on seasonal availability. He and his chefs support the Gifft Hill School’s EARTH Program, sourcing much of their local product from the student-run gardens. This approach breeds an innate flexibility when approaching vegetarian, raw food, and other restricted diet menus; as well as creating custom menus for clients interested in an “island to table” approach.

In 2016, Chef Mat and his team began executing Full Moon Dinners, changing the theme every month and collaborating with local distributors to create the perfect drink pairings for the multi-course affairs. Continuing with the theme of fresh and local, they have cultivated and maintained a small garden, drawing product from it whenever possible, and are the first business on St. John to become Reef Responsible certified.

Read how Mathayom has changed the catering world on St. John!



When you call St. John Catering it’s Conor Sieban’s friendly voice that greets you. Conor is the Office Assistant and Inside Sales Rep for St. John Catering and Mathayom Private Chefs.

Hailing from Connecticut Conor’s love affair with St. John started long before he moved to the island in 2016, but he waited until after completing his bachelor’s from Eastern Connecticut State University (majoring in communications/minoring in Business Information Systems) before taking the plunge and moving to St. John full time.

In addition to our office you can also catch Conor entertaining the beach-going masses as DJ Fastforward or rooting for his favorite teams (Pittsburgh Steelers and New York Yankees) at one of St. John’s local sports bar.

Bio pic_Mary

Mary Bourassa is the Website Administrator and Media Manager for St. John Catering and Mathayom Private Chefs. She was raised in Colorado but also spent time traveling and living in Central America, Europe and China before moving to St. John. Mary joined St. John Catering & Mathayom Private Chefs after the devastating 2017 hurricane season helping to rebuild and rebrand the company. When not at work you’ll find Mary on the beach with a book in one hand and a Painkiller in the other!