Our professionals provide assurance, tax, and consulting services to clients locally, regionally, and across the nation.
Our audit and assurance services identify opportunities to improve accounting information systems, tighten financial control, and, ultimately, enable management to obtain the most accurate information for making strategic decisions.
Our firm is a leader in tax compliance and sophisticated tax planning strategies. The scope of our tax practice goes far beyond routine tax return preparation for businesses, individuals and trusts.
Our consulting professionals have substantial experience and are committed to providing clients with valuable information to help them make the best business planning decisions.
Utilizing a niche team approach and organizing around your unique industry enables us to develop an in-depth understanding of your business.
Sisterson was founded in Pittsburgh, Pennsylvania, and our headquarters is still located downtown in the Union Trust Building. Our firm has lived through the Great Depression, the rise and fall of the steel industry, and the emergence of the technology sector in our city. We proudly serve clients outside of the region and around the country but we are truly a Pittsburgh-based firm.
Today, we stand atop the shoulders of our founders, our employees, and all of the valued clients we’ve served, as we prepare to usher in our next hundred years. We’re proud of our history. And we’re thrilled about our future.
One firm, one office, one mission. The employees and partners of Sisterson work out of one office, in the Union Trust Building, in downtown Pittsburgh.
Our collaborative environment, work-life balance and commitment to the non-profit community.
For 100 years, our professionals have served clients large and small with the same standard of service.
Sisterson is very interested in recruiting and retaining individuals committed to providing and supporting quality client service.
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Spring audit fieldwork may seem distant when your nonprofit is busy with year-end fundraising and program demands. But for organizations with a December 31 year end, the final months of 2026 offer a valuable opportunity to organize records, resolve accounting questions and coordinate with auditors.
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Pennsylvania amended its local sales tax sourcing rules to align Philadelphia and Allegheny County taxes with the state's destination-based sourcing framework.
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