Sisterson is one of the largest independently-owned certified public accounting and financial consulting firms in the Pittsbu ... rgh area. Our growth since the firm's inception in 1926 has been deliberate and steady as services and staff are added to meet the needs of our clients. The firm presently serves hundreds of clients and takes pride in preserving a tradition that began more than 90 years ago - delivering quality service and value to each client while developing long-term relationships. Our mission is to enhance the success of our clients through our commitment, creativity, and competencies as a respected and responsive provider of value-added financial services. The professionals at Sisterson provide: tax, audit and accounting, consulting, technology, and commercial lender services. We work in a variety of industries, but consider these as areas of expertise for our firm: manufacturing and distribution, private investment companies, not-for-profit, private foundations, real estate, energy, professional services, emerging businesses, technology, and employee benefit plans. read more