Thomas J. Hennessey

Senior Associate

Primary Location: New York, NY

Secondary Location: Stamford, CT

Phone: 212.805.3975


Thomas Hennessey is a senior associate in the New York office of Clausen Miller, P.C., and practices exclusively within the national subrogation group.  Thomas holds active law licenses in the states of New York, Connecticut and North Carolina, and brings his seven years of litigation and corporate experience to the firm for the benefit of its clients.

In Thomas’s subrogation practice, he is responsible for identifying the responsible party(ies), quickly issuing notice of loss letters, reducing the risk of evidence destruction, guiding the selection of necessary experts, leading the investigation, communicating with adversaries, negotiating, mediating and/or litigating, and taking a matter to trial if necessary.

Prior to joining Clausen Miller, P.C., Thomas practiced litigation and completed several jury trials.  Thomas gained a great amount of experience in evidence collection, depositions, and negotiation, in addition to what is required to try a case to jury verdict.  Thomas also served as general counsel for a real estate investment company and retail/wholesale gasoline company.  From his experience as general counsel, Thomas understands the cost benefit analysis for our clients to litigate or settle disputes, in addition to preserving any business relationships pertaining to the dispute.

Thomas’s prior experience in real estate investment involved multiple renovations and construction projects. Thomas brings his experience in construction to every property loss investigation and works directly with the experts to properly identify the origin and cause of the loss, and think out of the box, to properly advise our clients on the avenues for recovery.

Thomas’s passion for litigation started when he was selected to Campbell Law’s exclusive National Trial Team and had the unique opportunity to be mentored by his coach, former Chief of the Litigation Division of the Judge Advocate General Office in Washington, D.C.  Thomas learned the intricacies of trial practice, cross examination, persuasion, opening and closing statements, exhibits, positioning within the courtroom, and the structure of witness questions.  The foundation of Thomas’s trial training was supported by his undergraduate education at New York University where Thomas studied Speech and Interpersonal Communication.  Thomas completed numerous classes in the fields of argumentation and debate, conflict management, interpersonal speech, public speaking, communication and public relations, and team building.  One of Thomas’s accomplishments while at NYU was being selected as Senior Class President of Steinhardt, and delivering a speech at his graduation ceremony in Radio City Music Hall in front of 5,000 attendees.

In Thomas’s free time, he enjoys playing basketball in the city league of New York City, skiing, snowmobiling, trying new restaurants, and traveling with his wife, Jessica.


  • New York University, BS, Economics and Communication, 2007
  • Norman Adrian Wiggins School of Law, Campbell University, JD, 2010

Bar Admissions

  • New York
  • North Carolina
  • Connecticut


  • North Carolina State Bar
  • State Bar of Connecticut
  • New York State Bar Association
  • Chicago

    Illinois 60603

    10 South LaSalle Street

    Chicago, Illinois 60603

    T: 312.855.1010 TF: 800.826.3505 F: 312.606.7777 Office Managing Partner: Dennis D. Fitzpatrick

  • New York

    New York 10005

    28 Liberty Street 39th Floor

    New York, New York 10005

    T: 212.805.3900 TF: 800.826.3505 F: 212.805.3939 Office Managing Partner: Tyler Jay Lory

  • Irvine

    California 92614

    17901 Von Karman Avenue

    Suite 650

    Irvine, California 92614

    T: 949.260.3100 TF: 800.826.3505 F: 949.260.3190 Office Managing Partner: Ian R. Feldman

  • Florham Park

    New Jersey 07932

    100 Campus Drive

    Florham Park, New Jersey 07932

    T: 973.410.4130 TF: 800.826.3505 F: 973.410.4169 Office Managing Partner: Carl M. Perri

  • Michigan City

    Indiana 46360

    200 Commerce Square

    Michigan City, Indiana 46360

    T: 219.262.6106 TF: 800.826.3505 F: 312.606.7777 Office Managing Partners: Paige M. Neel, Kimbley A. Kearney

  • Appleton

    Wisconsin 54914

    4650 W. Spencer Street

    Appleton, Wisconsin 54914

    T: 920.560.4658 TF: 800.826.3505 F: 920.968.4650 Office Managing Partner: Patrick L. Breen

  • Stamford

    Connecticut 06902

    68 Southfield Avenue

    2 Stamford Landing Suite 100

    Stamford, Connecticut 06902

    T: 203.921.0303 TF: 800.826.3505 F: 212.805.3939 Office Managing Partner: Matthew J. Van Dusen

  • Tampa

    Florida 33609

    4830 West Kennedy Boulevard

    Suite 600

    Tampa, Florida 33609

    T: 813.509.2578 TF: 800.826.3505 F: 312.606.7777 Office Managing Partner: Anne E. Kevlin

  • Orlando

    Florida 32801

    618 E. South Street

    Suite 500

    Orlando, Florida 32801

    T: 813.509.2578 TF: 800.826.3505 F: 312.606.7777 Office Managing Partner: Anne E. Kevlin

  • San Francisco

    California 94111

    100 Pine Street

    Suite 1250

    San Francisco, California 94111

    T: 415.745.3598 TF: 800.826.3505 F: 949.260.3190 Office Managing Partner: Ian R. Feldman