Insights

Growth Stability Longstanding, independently-owned CPA and financial consulting firm with a century-long track record and steady growth, signaling reliability and a stable client base ripe for expansion conversations in tax, audit, accounting, and advisory services.

Mid Market Focus Serves hundreds of clients across industries including manufacturing, real estate, private investment, not-for-profit, and energy, presenting multiple entry points for cross-selling tax planning, assurance, and specialized consulting to mid-market organizations.

Service Suite Comprehensive offerings in tax, audit, accounting, consulting, and field exams provide opportunities to bundle services for existing clients and introduce advisory solutions such as technology-enabled processes and efficiency improvements.

Technology Footprint Adopts common business tech tools (Microsoft Office ecosystem, analytics, marketing platforms) which can be leveraged to demonstrate digital modernization and data-driven insights in client engagements, potentially opening doors for advisory tech implementations.

Growth Opportunities Revenue range indicates scalable operations with potential for increased share in core industries and potential regional expansion, suggesting upsell opportunities with current clients and targeted outreach to similar firms in the market.

Sisterson & Co. LLP Tech Stack

Sisterson & Co. LLP uses 8 technology products and services including Microsoft Excel, JSON-LD, Microsoft, and more. Explore Sisterson & Co. LLP's tech stack below.

  • Microsoft Excel
    Editors
  • JSON-LD
    Javascript Frameworks
  • Microsoft
    Miscellaneous
  • Microsoft Office
    Office Suites
  • Microsoft Word
    Office Suites
  • X-Content-Type-Options
    Web & Portal Technology
  • Google Analytics
    Web Analytics
  • AddThis
    Widgets

Sisterson & Co. LLP's Email Address Formats

Sisterson & Co. LLP uses at least 1 format(s):
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 July 2026, Sisterson & Co. LLP's annual revenue is estimated to be $100M - $250M.

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

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Sisterson & Co. LLP's SIC code is 7389 - Business Services, Not Elsewhere Classified 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 July 2026, Sisterson & Co. LLP has approximately 118 employees across 1 continents, including North America. Key team members include Owner: E. L.Partner: J. S.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 Microsoft ExcelJSON-LDMicrosoftMicrosoft OfficeMicrosoft WordX-Content-Type-OptionsGoogle AnalyticsAddThis.

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

Section iconFunding & Financials

  • $100M - $250M

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

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