Attorneys Coleen M. Penacho

Print this page

attorney photo for print
of counsel | Portsmouth, NH

Previously with the firm Cook Little, Coleen joined Sheehan Phinney in 2022. She counsels businesses on data privacy and protection, and compliance with local and international data privacy laws. Coleen provides B2B and B2C clients of all sizes with advice and guidance on privacy obligations, including data processing agreements, privacy policies, and data breaches. She also advises businesses regarding due diligence for mergers and acquisitions. Coleen has handled business litigation cases in state and federal courts and administrative tribunals including employment matters, non-compete claims, trademark and copyright infringement, trade secrets, partnership disputes, and lender liability.

Key Cases

  • Represented significant provider of product testing platform on privacy program including application of GDPR, PIPEDA, and CCPA, preparation of privacy policy, and negotiation of numerous data processing agreements
  • Advised multiple educational services clients in regard to federal and state laws, processing of student data, privacy policies, data processing agreements and master agreements
  • Counseled numerous startup companies on data privacy and security including international and U.S. privacy laws, controller and processing agreements, and privacy policies
  • Represented multiple clients regarding privacy due diligence in business acquisitions and dispositions
  • Part of team representing medical device company in successful prosecution of multi-million dollar trade secret litigation


  • State of New Hampshire
  • United States District Court for the District of New Hampshire
  • United States Court of Appeals for the First Circuit
  • New Hampshire Bar Association, Corporation, Banking and Business Law Section

Civic Involvement

  • Past Board Member, Optima Bank & Trust, Nominating and Governance Committee Chair
  • Past Board Chair, Seacoast YMCA
  • Past Board Member, Granite YMCA
  • New Hampshire DOVE volunteer
  • Past Trustee of the Trust Funds, Town of Greenland
  • Past Board Member, American Red Cross – New Hampshire Region