What departments does Kostelanetz LLP have?

Kostelanetz LLP has employees across 5 departments including Operations, Business Development, Legal, Program & Project Management, Accounting.

What is the largest department at Kostelanetz LLP?

The largest department at Kostelanetz LLP is Legal with 15 employees.

Where are Kostelanetz LLP employees located globally?

Kostelanetz LLP has employees across 1 continents and 1 countries including United States Of America.

How has Kostelanetz LLP's team size changed over time?

Kostelanetz LLP's team has grown from approximately 69 to 75 employees based on available data.

Kostelanetz LLP Employee Directory

Law PracticeNew York, United States51-200 Employees

Kostelanetz LLP is a New York City-based law practice with more than seven decades of experience handling high-stakes controversies and negotiations with government agencies. Its core strengths lie in tax controversies and white-collar defense, while it also provides tax and estate planning, commercial litigation, government procurement, and government contracting services. The firm draws on attorneys who have previously held senior roles in the Internal Revenue Service and the Department of Justice, and several lawyers have served as federal judicial law clerks or hold advanced degrees in taxation. Kostelanetz has been recognized in major legal rankings, with partners listed in Best Lawyers and Super Lawyers and the firm named Tax Team of the Year by Chambers USA in 2018. Recent development includes the addition of two partners in 2025, Victor Suthammanont and Melissa Wiley, expanding the New York office.

Kostelanetz LLP Global Highlights

North America
87

United States Of America
87

Kostelanetz LLP's Leadership

T. W.
President Of Welty Pc
Mobile Phone
Email
A. S.
Partner
Mobile Phone
Email
B. S.
Partner
Mobile Phone
Email
C. C.
Partner
Mobile Phone
Email
C. R.
Partner
Mobile Phone
Email
C. M.
Partner
Mobile Phone
Email
I. W.
Partner
Mobile Phone
Email
J. N.
Partner
Mobile Phone
Email

Kostelanetz LLP Employee Metrics

100%

50%

0%

2026

2025

Legal
Accounting
Business
Business Development
Administrative
Other
Information Security

Contact profiles from Kostelanetz LLP

Name

Title

Contact Info

Location

Last Update

B. W.
Senior Counsel
Mobile Phone
Email
United StatesNew York
Oct 26, 2025
A. P.
Senior Paralegal
Mobile Phone
Email
United StatesNew York
Feb 25, 2026
F. A.
Counsel
Mobile Phone
Email
United StatesNew Jersey
Jun 19, 2026
L. R.
Paralegal
Mobile Phone
Email
United StatesNew York
Dec 30, 2025
C. W.
Project Coordinator, Technology And Cybersecurity
Mobile Phone
Email
United StatesNew York
Nov 11, 2025
D. C. D.
Associate
Mobile Phone
Email
United StatesDistrict of Columbia
Oct 25, 2025
D. W.
Counsel
Mobile Phone
Email
United StatesMichigan
Apr 13, 2026
D. R.
Associate
Mobile Phone
Email
United StatesGeorgia
Feb 25, 2026
E. C.
Tax Counsel
Mobile Phone
Email
United StatesNew York
May 30, 2026
G. H.
Associate
Mobile Phone
Email
United StatesVirginia
Feb 25, 2026

Frequently Asked Questions

What is Kostelanetz LLP known for?

Kostelanetz LLP was founded in 1946 operates in the Law Practice industry. The company's main headquarters is located in 7 World Trade Center 34th Floor New York, New York 10007 United States; you can contact the main corporate office by phone at

+1-212-808-****

. Explore Kostelanetz LLP's company overview page for more information.

What is Kostelanetz LLP's most common email format?

Kostelanetz LLP employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more Kostelanetz LLP email formats with LeadIQ.

How many employees does Kostelanetz LLP have currently?

Kostelanetz LLP has approximately 77 employees as of June 2026. These team members are located across 1 continents, including North America.

Who are Kostelanetz LLP's key employees and leadership?

As of June 2026, Kostelanetz LLP's key employees include:

President Of Welty Pc: T. W.
Partner: A. S.
Partner: B. S.
Partner: C. C.
Partner: C. R.

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

Everything for prospecting,
in one platform.

What you can expect from LeadIQ:

B2B data verified in real-time
Sync data to your CRM, & add it to an outreach sequence in one click
Integrations with your tech stack for optimal efficiency
A patented AI cold email generator
Account & contact-level job change tracking

Kostelanetz LLP Employee Directory

Find Kostelanetz LLP employees' phone numbers or email addresses

Name search is limited — try advanced search instead