Sisterson is one of the largest certified public accounting and financial consulting firms in western Pennsylvania. Our professionals provide tax, audit and assurance, consulting and lender services to clients regionally and across the nation. We also provide information technology consulting and financial planning services to clients.

For more than 85 years, our philosophy has been consistent - commit to excellence, the highest of ethics, and personal service in each engagement for every client.  What differentiates us from other firms is what we call the Sisterson Standard.  Simply, these are the standards by which we work with our clients and how we run our engagements:

• Partner involvement - we have a partner involved with every engagement
• Responsiveness - our professionals respond to clients in a timely matter
• Quality - our level of technical work is second to none
• Retention - we work to keep our staff turnover at lower than average rates