Andrew O'Connor

Mr. Liss leads the Corporate Governance and General Equity Litigation Team at Gibbons. His practice is focused on resolving complex business and corporate disputes with an emphasis on shareholder and corporate governance disputes, trust and estate litigation, business torts, commercial contract disputes, and general commercial litigation. He has extensive experience in all aspects of commercial litigation and has represented both plaintiffs and defendants in various matters at the trial and a...

Lisa provides knowledgeable counsel and compassionate legal advocacy to individuals navigating the complexities of matrimonial and family law. Recognizing that family transitions are both legally intricate and emotionally taxing, she tailors her approach to meet the specific goals of each client—whether through assertive litigation or skilled mediation. She represents clients in all aspects of divorce and family law, including matrimonial litigation, child custody, domestic partner disp...

Susan C. Karp is a lawyer recognized by Best Lawyers in the practice area of Environmental Law. Susan C. practices law in Newark, New Jersey Best Lawyers has recognized Susan C. Karp since 2024. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Susan C. Karp is held by other lawyers.

Theresa DiGuglielmo is a lawyer recognized by Best Lawyers in the practice area of Health Care Law. Theresa practices law in Pine Brook, New Jersey Best Lawyers has recognized Theresa DiGuglielmo since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Theresa DiGuglielmo is held by other lawyers.

Joel Siegel’s practice focuses on counseling high net worth individuals and multi-generational families in a manner which enables them to achieve their tax, and more importantly, their non-tax objectives. To accomplish this goal, he works closely with his clients and their other advisors to fully understand their family situation, their financial situation and their wishes and concerns for their spouses and descendants. Joel also handles tax controversy matters before the Internal Reven...

Michael J. Lubben is a Director of Gibbons P.C., practicing in the Corporate Department and a member of the firm's Distressed Situations Group. Mr. Lubben has had extensive experience with financial, corporate and business matters for a variety of private and public companies including healthcare companies, banks, governmental authorities and charter schools. Mr. Lubben’s practice focuses on transactional work, with an emphasis on real estate financing transactions, issues relating to t...

Jeffrey Hugh Newman, CRRP, CRX, is Chair of the Sills Cummis & Gross Real Estate Department. He has been practicing in the area of real estate, real estate litigation, litigation strategy and positioning, and real estate finance for over 45 years bringing to his practice a background in corporate and business law, coupled with a Master’s Degree in Taxation. He is both a trusted business advisor and legal counselor to clients nationally and internationally.

Ahmed J. Kassim is a Member in the Sills Cummis & Gross Litigation Department. He is a skilled trial lawyer and appellate advocate who handles high-stakes product liability and complex commercial disputes in courts around the country. He represents some of the world’s best-known companies across an array of industries, including pharmaceuticals, medical devices, consumer products, telecommunications, insurance, banking, and retail. Clients value his ability to zealously advocate for...

James J. Panzini is a lawyer recognized by Best Lawyers in the practice area of Litigation - Labor and Employment. James J. practices law in Berkeley Heights, New Jersey Best Lawyers has recognized James J. Panzini since 2024. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which James J. Panzini is held by other lawyers.

John R. Vreeland is a lawyer recognized by Best Lawyers in the practice area of Employment Law - Management. John R. practices law in Berkeley Heights, New Jersey Best Lawyers has recognized John R. Vreeland since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which John R. Vreeland is held by other lawyers.