William Deyesso is an alumnus of the Bryant & Stratton School of Business, where he earned a bachelor's degree in computer science. Upon earning his degree, William Deyesso pursued his passion for real estate development and management and was soon after hired by the nationally-known developer Winn Development. He spent more than 25 years with the company in a variety of capacities, including executive vice president, and played a significant role in the development of medical office buildings, luxury hotels, and garden-style apartment communities. Additionally, he contributed to the maturation of the company through successful long-term growth strategies.

In 2000, William Deyesso transitioned to the insurance industry and began working as CEO of Royal Administration Services. Leveraging experience and knowledge in all aspects of direct writer insurance operations and issues relating to the running of offshore companies, Mr. Deyesso provided insurance services to a diverse clientele with combined assets worth billions of dollars.

Now retired, he maintains civic responsibility through his involvement with the Rotary Club and his support of nonprofit organizations such as Toys for Tots, Special Olympics, and various food banks throughout Boston.