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William Deyesso leverages nearly three decades of Boston real estate experience as CEO of Royal Administration Services, Inc. Based in Hanover, his company offers a full range of third party insurance administration solutions. A core focus of William Deyesso and his team at Royal is on fulfilling the needs of clients who are together responsible for managing global assets totaling billions of dollars.

Mr. Deyesso previously held executive responsibilities with Winn Development. There, he oversaw new developments as well as the upgrading of affordable, quality housing nationwide. Among his high-profile undertakings was overseeing progress on the luxury Millennium Boston Hotel. He also led the development of medical office space and attractive apartment communities that offered garden-style living.

A dedicated grandfather, Mr. Deyesso maintains a strong community focus and supports organizations ranging from Toys for Tots and the American Cancer Society to the Kennedy Elderly Center in Charlestown. William Deyesso also maintains a New Hampshire gentleman’s farm and supports farm-to-table initiatives.


Computer Science

Bryant & Stratton School of Business


Hobbies & Interests

Skiing, Deep Sea fishing, Yoga, Fencing, Cross Country, Biking, Mountain Biking, Fishing Tournaments, Worldwide farming ,Golfing

Charitable Activities

CampTimanous of Maine, Toys for Tots, American Cancer Society, Homless shelter Boston, Ma. Special Olympics, Junior Olympics, Elderly Centers, Food Bank of Boston, South Shore Hospital Weymouth Ma., Visiting Nurses Assoc., Project Place (Brockton, Ma.), South Shore Hospice, Children’s Hospital, Autism Research