Trumbull was established in 1997 as a service provider to the insurance industry. The company's initial focus was on property and casualty premium collections and customer service. A natural progression led the company to expand the services offered first to the area of subrogation, and subsequently to full back-office services for commercial lines policy management.

As Trumbull evolved, the company developed a high degree of expertise and proficiency in several distinct areas, including Business Process Outsourcing (BPO) for both policy administration and subrogation, and professional services to support the company's expanded product offerings.