Insights

Growth Opportunity Established, long-standing Pittsburgh accounting and financial services firm with 51-200 employees and revenue between 100M and 250M presents upsell potential across tax, audit, consulting, and field exam services to mid-market clients.

Industries Served Focus areas include manufacturing, private investment, real estate, energy, professional services, and technology. Target firms in these sectors for complementary services such as cost optimization, internal controls, and specialized tax planning.

Technology Stack Adoption of Zoho, Adobe, Microsoft 365, and ASP.NET indicates openness to digital workflows and client portals. Leverage or expand digital collaboration tools to streamline audits, tax engagements, and advisory projects.

Growth Drivers Centennial legacy with deliberate, steady growth and long-term client relationships suggest opportunities to offer scalability services, integration projects, and value-added advisory to existing clients as they expand.

Strategic Position Independent firm with strong local presence and high revenue tier for the region; position as a trusted partner for enhanced compliance, private foundations and not-for-profit entities, and growth financing advisory.

Similar companies to Sisterson & Co. LLP

Sisterson & Co. LLP Tech Stack

Sisterson & Co. LLP uses 8 technology products and services including UserWay, Canva, Zoho, and more. Explore Sisterson & Co. LLP's tech stack below.

Sisterson & Co. LLP's Email Address Formats

Sisterson & Co. LLP uses at least 4 email formats:
Sisterson & Co. LLP Email FormatsExamplePercentage
FLast@sisterson.comJDoe@sisterson.com
69%
FirstLast@sisterson.comJohnDoe@sisterson.com
15%
FiLast@sisterson.comJoDoe@sisterson.com
12%
FMLast@sisterson.comJMDoe@sisterson.com
4%

Frequently Asked Questions

What is Sisterson & Co. LLP's phone number?

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You can contact Sisterson & Co. LLP's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Sisterson & Co. LLP's official website and social media links?

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Sisterson & Co. LLP's official website is sisterson.com and has social profiles on LinkedIn.

How much revenue does Sisterson & Co. LLP generate?

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As of October 2026, Sisterson & Co. LLP's annual revenue is estimated to be $100M - $250M.

What is Sisterson & Co. LLP's SIC code and NAICS code?

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Sisterson & Co. LLP's SIC code is 7389 - Business Services, Not Elsewhere Classified and NAICS code is 5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services.

How many employees does Sisterson & Co. LLP have currently?

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As of October 2026, Sisterson & Co. LLP has approximately 120 employees across 2 continents, including North America and Asia. Key team members include Owner: E. L., Partner: J. S. and Tax Manager: A. S. Explore Sisterson & Co. LLP's employee directory with LeadIQ.

What industry does Sisterson & Co. LLP belong to?

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Sisterson & Co. LLP operates in the Accounting industry.

What technology does Sisterson & Co. LLP use?

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Sisterson & Co. LLP's tech stack includes UserWay, Canva, Zoho, Adobe Experience Cloud, Microsoft 365, Constant Contact, Adobe Creative Suite and Microsoft ASP.NET.

What is Sisterson & Co. LLP's email format?

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Sisterson & Co. LLP's email format typically follows the pattern of FLast@sisterson.com. Find more Sisterson & Co. LLP email formats with LeadIQ.

When was Sisterson & Co. LLP founded?

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Sisterson & Co. LLP was founded in 1926.
Sisterson & Co. LLP logo

Sisterson & Co. LLP

AccountingPennsylvania, United States51-200 Employees

Sisterson & Co. LLP is a mid-sized, independently owned certified public accounting and financial consulting firm based in Pittsburgh, Pennsylvania. Founded in 1926, the firm has grown steadily by expanding services and staff to meet client needs. It serves hundreds of clients and provides a spectrum of services that include tax, audit and accounting, consulting, and field examinations. 

Operating within the accounting industry, Sisterson aims to deliver value-added financial services that support client success. Its areas of expertise span manufacturing and distribution, private investment companies, not-for-profit organizations and private foundations, real estate, energy, professional services, technology, and employee benefit plans. The firm is rooted in Pittsburgh and maintains a regional client base across multiple sectors.

Section iconCompany Overview

Phone number
SIC Code
7389 - Business Services, Not Elsewhere Classified
NAICS Code
5412 - Accounting, Tax Preparation, Bookkeeping, and Payroll Services
Founded
1926
Employees
51-200

Section iconFunding & Financials

  • $100M - $250M

    Sisterson & Co. LLP's revenue is estimated to be in the range of $100M - $250M

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