
Common Law US
Business Law.One Strategic Partner.
Start or Grow Your U.S. Business
Corporate formation, contracts, M&A, and outside general counsel for companies building in the United States.

How can I help you?
Jonathan (JT) Mann has practiced business law for more than thirty years. He helps U.S. and international businesses succeed.
Business Law
01 / Startups & Technology Companies
Startups & Technology Companies
Entity formation, founder agreements, equity, vesting, SAFEs and convertibles, venture financings, and the commercial and SaaS agreements that carry a company from idea to institutional scale.
Get in Touch→02 / Mergers & Acquisitions
Mergers & Acquisitions
Buy-side and sell-side representation across the middle market, from letter of intent through diligence, definitive agreements, and closing.
Get in Touch→03 / International Transactions
International Transactions
Joint ventures, distribution and agency arrangements, and inbound and outbound investment for companies operating across borders.
Get in Touch→04 / Non-Profit Organizations
Non-Profit Organizations
Formation, governance, and outside general counsel support for U.S. non-profit organizations, including board governance and the everyday contract work that keeps a mission-driven organization running.
Get in Touch→
A broad legal practice based in Boston — but ready to meet with you in Manhattan, Orlando/Miami, Rio de Janeiro, Seoul or elsewhere around the globe.
Helping businesses succeed across the U.S. and around the world.
Credentials
Why Clients Trust Our Firm
More than thirty years of practice in the United States and abroad.
Bar Admissions: Massachusetts · New York · Maine · U.S. Supreme Court
Former law clerk, U.S. Court of Appeals for the First Circuit, Boston.
Former Foreign Legal Consultant, Seoul, Republic of Korea.
Cross-Border Practice

Brazil

South Korea

Spain

Portugal

United Kingdom