What departments does Sisterson & Co. LLP have?

Sisterson & Co. LLP has employees across 4 departments including Operations, Marketing, Information Technology, Administrative.

What is the largest department at Sisterson & Co. LLP?

The largest department at Sisterson & Co. LLP is Information Technology with 2 employees.

Where are Sisterson & Co. LLP employees located globally?

Sisterson & Co. LLP has employees across 1 continents and 1 countries including United States Of America.

How has Sisterson & Co. LLP's team size changed over time?

Sisterson & Co. LLP's team has decreased from approximately 115 to 108 employees based on available data.

Sisterson & Co. LLP Employee Directory

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.

Sisterson & Co. LLP Global Highlights

North America
150

United States Of America
150

Sisterson & Co. LLP's Leadership

J. S.
Partner - Assurance Services
Mobile Phone
Email
J. N.
Partner
Mobile Phone
Email
M. W.
Partner - Consulting Services
Mobile Phone
Email
D. O.
Managing Partner
Mobile Phone
Email
M. U.
Partner - Assurance Services
Mobile Phone
Email
M. R.
Partner
Mobile Phone
Email
W. M. R.
Partner
Mobile Phone
Email
L. D.
Partner - Finance & Operations
Mobile Phone
Email

Sisterson & Co. LLP Employee Metrics

100%

50%

0%

2026

2025

Accounting
Information Technology
Consultant
Administrative
Analytics
Other

Contact profiles from Sisterson & Co. LLP

Name

Title

Contact Info

Location

Last Update

J. S.
Partner - Assurance Services
Mobile Phone
Email
United StatesPennsylvania
Feb 09, 2026
J. N.
Partner
Mobile Phone
Email
United StatesPennsylvania
May 28, 2026
M. W.
Partner - Consulting Services
Mobile Phone
Email
United StatesPennsylvania
Apr 15, 2026
D. O.
Managing Partner
Mobile Phone
Email
United StatesPennsylvania
Apr 16, 2026
M. U.
Partner - Assurance Services
Mobile Phone
Email
United StatesKansas
Apr 15, 2026
M. R.
Partner
Mobile Phone
Email
United StatesPennsylvania
Feb 09, 2026
W. M. R.
Partner
Mobile Phone
Email
United StatesPennsylvania
Mar 25, 2026
L. D.
Partner - Finance & Operations
Mobile Phone
Email
United StatesPennsylvania
Mar 11, 2026
E. L.
Owner
Mobile Phone
Email
Oct 22, 2024
J. S.
Partner
Mobile Phone
Email
Oct 23, 2024

Frequently Asked Questions

What is Sisterson & Co. LLP known for?

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 Pittsburgh, Pennsylvania 15219 United States; you can contact the main corporate office by phone at

+1-412-281-****

. Explore Sisterson & Co. LLP's company overview page for more information.

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

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?

Sisterson & Co. LLP has approximately 120 employees as of June 2026. These team members are located across 1 continents, including North America.

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

As of June 2026, 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.

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Sisterson & Co. LLP Employee Directory

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