William Mulligan Photo

William Mulligan

  • Profile
  • Associations
  • News & Media

William P. Mulligan is a partner at Grossman Roth Yaffa Cohen. He began working directly out of law school at a boutique defense firm, where he worked for 2 years with a focus on personal injury and insurance defense. He then worked at a national personal injury and medical malpractice defense firm for 10-11 months, where he continued to focus on personal injury and insurance defense prior to joining Grossman Roth Yaffa Cohen. William now fights for the best interests of clients who have suffered a serious injury at the hands of others.

He received a B.A. in Business Administration at the Warrington College of Business at University of Florida, with a minor in communications. William received a law degree from Boston College Law School. While at Boston College he represented clients who could not afford legal representation at the Boston College Legal Assistance Bureau, as a student practitioner pursuant to S.J.C Rule 3:03.

Selected Memberships

  • Florida Bar
  • District of Columbia Bar
  • Florida Bar Committee on Technology


  • University of Florida, Warrington College Of Business, B.A.
  • Boston College Law School, J.D.


  • 40 under 40, Outstanding Lawyers of South Florida: 2018
  • Super Lawyers Rising Stars, Top Attorneys in Florida: 2019- 2021
  • Best Lawyers in America; Ones to Watch: 2022


  • Super Lawyers
    Super Lawyers
  • Super Lawyers Rising Stars
    Super Lawyers Rising Stars
  • Best Lawyers - Ones To Watch
    Best Lawyers - Ones To Watch

A Legacy of Compassion & Excellence

Working With Grossman Roth Yaffa Cohen
  • Changing Lives by Changing The Law

    Since our firm opened, we've made it our mission to get justice for our clients and their families. We've not only taken on cases that other firms had turned down, but we've also fought to get unjust laws and restrictions overturned or modified.

  • A Team of Legal Professionals

    Complex legal cases require extensive research, trial experience, and industry knowledge, which is why we always have a team of attorneys working on every case we take on. Our team-centric approach to litigation means that we're able to really focus on getting our clients the best possible outcome.

  • There Are No Upfront Legal Fees

    We handle all of our claims on a contingency fee basis and will handle all legal fees, court costs, and expert fees related to your specific case. With decades of experience in this industry, we have a wealth of experts we work with routinely to ensure your case is handled with the utmost care.

  • We Understand the Medicine

    Our attorneys not only take the time to understand the evidence in your case, but also the pathology and medical techniques used in your specific situation. We believe that any attorney that takes on these types of cases needs to be on equal footing with medical professionals and physicians. 

A Legacy Of Getting Justice

Schedule A Free Consultation Today
  • Please enter your first name.
  • Please enter your last name.
  • Please enter your phone number.
    This isn't a valid phone number.
  • Please enter your email address.
    This isn't a valid email address.
  • Please make a selection.
  • Please enter a message.