BIG FIRM SERVICES. SMALL FIRM SERVICE. At DHA, we combine the services, advantages, and expertise of a large firm with the relationships you’d expect from a small one. We work with each client to determine a customized blend of services designed to help maintain focus on what is important to them, while helping them overcome obstacles and evaluate new opportunities. From handling the basics to guiding you through more complex strategies, our team provides a full range of services to meet the demands of any business or individual.