Jonathan M. Shirley

Jonathan M. Shirley is a trial lawyer and business counselor with Cullen Collimore Shirley PLLC in Nashua. With more than twenty years of practice, he represents clients ranging from startups and individuals to large companies in commercial litigation and related business disputes. His work includes intellectual property, trade secret, employment, contract, consumer protection, and technology-related matters. He also advises businesses on employee mobility, confidential information, trademarks, copyrights, cloud service agreements, data security, and other legal issues affecting operations and competitive relationships.

Shirley earned a B.A. in History from Vassar College and a J.D., cum laude, from Boston College Law School. His legal education supports a practice that combines courtroom advocacy with practical business counseling. Commercial disputes frequently require close reading of contracts, technical records, financial evidence, intellectual property rights, and workplace documents. His academic and professional training helps him organize complex records, identify legal issues, develop written and oral arguments, and communicate litigation risks to businesses and individuals facing significant disputes.

Shirley has tried cases before juries and judges and has handled appellate matters before the New Hampshire Supreme Court and the US Court of Appeals for the First Circuit. Representative work includes obtaining a $1.8 million judgment in a warranty dispute involving radiation-hardened microprocessors, defending a telecommunications company in a consumer protection trial, handling a PFAS putative class action, and litigating trade secret, royalty, noncompete, confidentiality, and trademark disputes. His matters often combine legal questions with technical or commercial facts.

Jonathan M. Shirley has been recognized by Best Lawyers for commercial litigation and litigation involving intellectual property. He has also served on the board of the Boys & Girls Club of Greater Nashua. His practice combines trial experience, appellate work, and day-to-day business advice, allowing him to help clients manage disputes while considering broader operational goals. He focuses on understanding the business context of a problem, evaluating litigation exposure, and developing practical strategies for negotiation, trial, appeal, or preventive counseling.

Law Office Affiliations

• Attorney, Cullen Collimore Shirley PLLC
• Member, New Hampshire Bar Association
• Member, Massachusetts Bar Association
• Board Member, Boys and Girls Club of Greater Nashua

Licensed State

• New Hampshire
• Massachusetts

Education

• Boston College Law School
  Juris Doctor (JD)
• Vassar College
  Bachelor of Arts (BA)

Awards & Badges