Sisterson & Co

Sisterson and Co. LLP, founded in 1926 and headquartered in Pittsburgh's historic Union Trust Building, is one of the largest independently-owned certified public accounting and advisory firms in the region. Operating from a single downtown Pittsburgh office with a collaborative work environment, the firm has grown organically for nearly a century, providing assurance, tax, and advisory services to clients across numerous industries. Their practice includes audit and assurance services to identify opportunities for improved accounting systems and financial controls, comprehensive tax services spanning compliance and sophisticated tax planning strategies for businesses, individuals, and trusts, and consulting services for valuations, field examinations, and due diligence. The firm serves specialized industries including manufacturing and distribution, technology, real estate and development, energy, employee benefit plans, and not-for-profit organizations. With 16 partner-level professionals and approximately 45 total staff, they emphasize partner involvement in all engagements, technical expertise, commitment to integrity, and dedicated responsive service. The firm is a member of AGN International and maintains triennial peer review certification.