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William P. Lewis

William P. Lewis


Pittsburgh, PA

How Bill Helps Clients

Bill concentrates his practice on ERISA, employee benefits law and traditional labor matters. Bill has extensive experience with matters involving multiemployer trust funds and with handling withdrawal liability claims, delinquent contribution claims, controlled group liability claims and alter ego/successor liability claims that arise in the ERISA context.  He also has extensive experience with traditional labor law, including unfair labor practice and representation proceedings before the National Labor Relations Board and negotiating collective bargaining agreements. 

Bill also has represented companies in a variety of employment and complex commercial ligation matters. These include age, gender and disability discrimination claims before the EEOC, as well as breach of contract, tortious interference, breach of fiduciary duty and unfair business practice claims.

Bill was honored by The Best Lawyers in America© in the Best Lawyers: Ones to Watch 2023 and 2024 editions in the area of Litigation – Labor and Employment.

What Clients Can Expect

Bill strives to offer his clients the best legal representation available through creative problem solving, zealous advocacy, careful attention to detail and hard work.

Nothing gives me greater satisfaction than knowing that I have served my client well.

Outside the Office

When he is not in the office, Bill enjoys spending time with his wife and two sons, water skiing and running. He has run the Pittsburgh Marathon for four consecutive years and is working toward achieving a qualifying time for the Boston Marathon.

Proof Points

  • Represented multiple Taft-Hartley Funds in multi-million dollar ERISA benefits litigation in both federal and state court.
  • Assisted a public employer prepare for and appropriately respond to a unionized workforce threatening to strike.
  • Defended a medical provider in a qui tam action involving claims under the False Claims Act and the Anti-Kickback Statute.
  • Defended a local municipality for breach of contract claims in a grievance arbitration.
  • Obtained a defense verdict for a utility company sued for property damage and trespass in connection with the maintenance of electric utility lines.