About Peter M
Peter M Merrigan is a partner at Sweeney Merrigan Law LLP who practices in Massachusetts. He works from offices in Boston, Falmouth and Greenfield. His career is rooted in courtroom work, and he represents clients across a range of litigation matters. Colleagues describe him as methodical; he prefers clear preparation over showmanship.
Merrigan earned his bachelor’s degree from James Madison University before attending New England Law | Boston, where he received his J.D. He has applied that training to a steady practice in state courts. He keeps up with developments in evidence and procedure and brings those skills back to his cases.
He joined Sweeney Merrigan Law LLP and rose to partner. At the firm he handles case development, motion practice and trials. His work involves both the preparation that happens before trial and the advocacy that takes place in the courtroom. The firm’s multiple offices allow him to meet clients in different parts of the state.
Merrigan maintains memberships in several professional organizations. He is a member of the Massachusetts Academy of Trial Lawyers, the Boston Bar Association and the National Lawyers Guild. Those associations provide networks and programs that support trial lawyers and litigators across Massachusetts.
In the courtroom he favors a straightforward style. He prepares witnesses and documents carefully, and he aims to make complex legal points accessible to judges and jurors. He also handles pretrial negotiation when it serves a client’s interests, but he does not shy from taking contested matters to trial when necessary.
He continues to practice in Massachusetts and draws on his trial experience in matters that proceed through state courts. He focuses his practice on litigation in Massachusetts courts.
