Posternak Blankstein & Lund LLP is now Arent Fox. Read the press release

James E. O’Connell, Jr.

Jim is recognized as one of Massachusetts’ top litigators and a trusted legal advocate for both individual and corporate clients.
James O'Connell, Jr., Counsel, Arent Fox LLP

Jim has more than 35 years’ experience in employment, business, franchise, probate and family law matters and real estate and partnership disputes, successfully representing executives and businesses in multi-million dollar litigation, arbitration and alternative dispute resolution. In addition to the courts of the Commonwealth of Massachusetts, Jim has trial experience in the federal courts of New York, Michigan, Virginia, and Georgia.

Prior to joining Posternak, Jim was a founding partner of Shilepsky O’Connell, a Boston employment and litigation boutique, and a litigation partner in the trial department at Perkins, Smith & Cohen. He was also co-founder and partner of two firms concentrating in civil litigation: Murphy & O’Connell and Sally, O’Connell & Fitch. He began his professional career in the litigation department of Bingham McCutchen, LLP. Jim was previously an attorney at Posternak Blankstein & Lund LLP.

Client Work

  • Represented minority shareholder in freeze-out litigation resulting in groundbreaking, multi-million dollar jury verdict.
  • Represented an international employer in a whistleblower retaliation case in federal court, resulting in the pre-trial dismissal of three of four counts and a jury verdict for the employer.
  • Represented an international employer in a breach of contract case in state court, resulting in a jury verdict for the employer.
  • Represented employees and employers in disputes regarding defense and enforcement of non-competition provisions and other restrictive covenants.
  • Represented numerous high-level executives in wrongful termination and other disputes, resulting in multi-million dollar settlements.
  • Represented high net worth individuals in complex divorce and post-divorce matters.
  • Represented the husband in a successful appeal to the Massachusetts Appeals Court, resulting in the Appeals Court’s issuance of new law regarding the treatment of Social Security benefits in the context of divorce.

Awards and Recognition

  • Best Lawyers in America in 2020, 2021
  • Massachusetts Super Lawyer every year from 2004 – 2018


  • American Bar Association
  • Massachusetts Bar Association
  • Boston Bar Association

Life Beyond the Law

  • Trustee for a substantial New Jersey charitable remainder trust
  • Co-Trustee for the family-and-friends trust of a successful workplace “whistleblower”
  • Volunteer on the Arlington 2020 Business Committee
  • Jim sails well and golfs poorly