Sisterson & Co. LLP Employee Directory

AccountingPennsylvania, United States51-200 Employees

Sisterson is one of the largest independently-owned certified public accounting and financial consulting firms in the Pittsburgh area.  

Our growth since the firm's inception in 1926 has been deliberate and steady as services and staff are added to meet the needs of our clients. The firm presently serves hundreds of clients and takes pride in preserving a tradition that began more than 90 years ago - delivering quality service and value to each client while developing long-term relationships.

Our mission is to enhance the success of our clients through our commitment, creativity, and competencies as a respected and responsive provider of value-added financial services.

The professionals at Sisterson provide: tax, audit and accounting, consulting, technology, and commercial lender services.

We work in a variety of industries, but consider these as areas of expertise for our firm: manufacturing and distribution, private investment companies, not-for-profit, private foundations, real estate, energy, professional services, emerging businesses, technology, and employee benefit plans.

Find Sisterson & Co. LLP employees' phone numbers or email addresses

Sisterson & Co. LLP Global Highlights

Location
Employees

North America
150

Minus sign iconPlus sign icon
  • United States Of America
    150

Europe
1

Minus sign iconPlus sign icon
  • Belgium
    1

Sisterson & Co. LLP's Leadership

  • Stylized image of a person
    J. S.
    Partner - Assurance Services
    Phone icon
  • Stylized image of a person
    J. N.
    Partner
    Phone icon
  • Stylized image of a person
    M. W.
    Partner - Consulting Services
    Phone icon
  • Stylized image of a person
    D. O.
    Managing Partner
    Phone icon
  • Stylized image of a person
    M. U.
    Partner - Assurance Services
    Phone icon
  • Stylized image of a person
    M. R.
    Partner
    Phone icon
  • Stylized image of a person
    W. M. R.
    Partner
    Phone icon
  • Stylized image of a person
    L. D.
    Partner - Finance & Operations
    Phone icon

Contact profiles from Sisterson & Co. LLP

Name
Title
Contact Info
Location
Last Update
  • Stylized image of a person
    J. S.
    Partner - Assurance Services
    Phone icon
    United StatesPennsylvania
    Nov 06, 2025
  • Stylized image of a person
    J. N.
    Partner
    Phone icon
    United StatesPennsylvania
    Oct 18, 2025
  • Stylized image of a person
    M. W.
    Partner - Consulting Services
    Phone icon
    United StatesPennsylvania
    Nov 06, 2025
  • Stylized image of a person
    D. O.
    Managing Partner
    Phone icon
    United StatesPennsylvania
    Dec 03, 2025
  • Stylized image of a person
    M. U.
    Partner - Assurance Services
    Phone icon
    United StatesPennsylvania
    Oct 24, 2025
  • Stylized image of a person
    M. R.
    Partner
    Phone icon
    United StatesPennsylvania
    Nov 06, 2025
  • Stylized image of a person
    W. M. R.
    Partner
    Phone icon
    United StatesPennsylvania
    Nov 16, 2025
  • Stylized image of a person
    L. D.
    Partner - Finance & Operations
    Phone icon
    United StatesPennsylvania
    Nov 06, 2025
  • Stylized image of a person
    E. L.
    Owner
    Phone icon
    Oct 22, 2024
  • Stylized image of a person
    J. S.
    Partner
    Phone icon
    Oct 23, 2024

Frequently Asked Questions

What is Sisterson & Co. LLP known for?

Minus sign iconPlus sign icon
Sisterson & Co. LLP was founded in 1926 operates in the Accounting industry. The company's main headquarters is located in 310 Grant Street, Suite 2100; you can contact the main corporate office by phone at . Explore Sisterson & Co. LLP's company overview page for more information.

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

Minus sign iconPlus sign icon
Sisterson & Co. LLP employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more Sisterson & Co. LLP email formats with LeadIQ.

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

Minus sign iconPlus sign icon
Sisterson & Co. LLP has approximately 125 employees as of December 2025. These team members are located across 2 continents, including North AmericaEurope.

Who are Sisterson & Co. LLP's key employees and leadership?

Minus sign iconPlus sign icon

As of December 2025, Sisterson & Co. LLP's key employees include:

  • Partner - Assurance Services: J. S.
  • Partner: J. N.
  • Partner - Consulting Services: M. W.
  • Managing Partner: D. O.
  • Partner - Assurance Services: M. U.

Looking for contact data? Unlock accurate emails and phone numbers for your ideal prospects with LeadIQ.

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust
LeadIQ to help them build pipeline confidently.

© LeadIQ, Inc. All rights reserved.