John P. Sheridan

JOHN P. SHERIDIAN

Representing Labor Unions & Their Members

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Sheridan, John P.

Principal

John Sheridan in a suit and tie is smiling for the camera.

John has over twenty years of experience representing labor unions and Taft-Hartley benefit funds in state and federal courts and before administrative agencies and arbitration tribunals in disputes related to the NLRA, the LMRDA, ERISA, union trusteeships, union discipline, contractual grievances, harassment and discrimination, retaliation, and alleged denial of benefits. John represents his union clients in labor-related matters, including arbitration, the defense of unfair labor practice charges, and collective bargaining negotiations. He also assists his union clients with compliance with the LMRDA.


John also has an active litigation practice in both state and federal court and before administrative agencies. He has litigated LMRA, LMRDA, ERISA and employment law cases on behalf of unions and Taft-Hartley benefit funds. He represents his clients at all stages of litigation including pleading, discovery, dispositive motions, trials and appeals. John has argued appeals before the United States Court of Appeals for the First, Second, and Third Circuits. He has also handled proceedings before administrative agencies including the NLRB, state labor relations agencies, and state civil rights divisions. John has also appeared before grievance arbitrators on behalf of unions in disciplinary disputes. In addition to counseling labor unions regarding labor management issues, John also counsels unions regarding LMRDA compliance and has conducted training seminars for his union clients.


John assists his benefit fund clients with the development, administration, and governance of ERISA-qualified, multiemployer plans, including complying with ERISA's fiduciary duty provisions and its reporting and disclosure requirements. Before joining Marrinan & Mazzola Mardon, John worked in the labor and employment department in a large firm in New Jersey, and prior to that, he worked for a union-side law firm in Boston, Massachusetts.

Areas Of Practice

  • Labor
  • ERISA
  • Employment
  • Litigation

Education

Professional Associations And Memberships

Why us

COMPREHENSIVE LABOR UNION REPRESENTATION SINCE 1955

Dedicated Legal Counsel For Labor Unions

Mazzola Mardon, P.C., represents its labor union clients in organizing, negotiations, arbitrations, federal and state court litigation, and proceedings before administrative agencies.


The firm’s ERISA practice involves representing multiemployer and single-employer Taft-Hartley pension, health and welfare, scholarship, and royalty funds.


Contact Us to Learn More About Our Legal Services

We work hard to help meet all of the unique legal needs of labor unions. To learn more, call us at (212) 425-3240.


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