Commercial Legal Lead

Mantel Capture, Inc • Cambridge, MA

17h • Remote

About The Position

Mantel is developing the first molten-salt-based carbon capture technology designed to operate at the high temperatures found inside boilers, kilns, and furnaces - enabling highly efficient carbon capture that has not been possible until now. Carbon capture can be applied across industries to reduce emissions and achieve net-negative emissions. By solving for efficiency Mantel can cut costs substantially, unlocking carbon capture's role in reaching net zero emissions by 2050. The Senior Commercial Counsel was designed for a specific kind of lawyer: one who has spent years in transactional practice, is genuinely good at it, and wants a bigger stage. As Senior Commercial Counsel, you'll own Mantel's contracts function end-to-end – Master Service Agreements (MSAs), licensing agreements, term sheets, offtake deals - while also having a real seat at the commercial strategy table. You'll shape how deals are structured, not just document them after the fact. This is the right role for a lawyer who finds pure legal practice too narrow. You'll be a genuine partner to the business, not a reviewer at the end of the process.

Requirements

• 5+ years of transactional legal experience, in private practice or in-house at a technology, energy, or industrial company
• Startup or early-stage company experience or exposure is a strong asset
• Law degree required
• Trained as a lawyer and proud of it - wants to help run and shape the process from the get-go in partnership with commercial colleagues
• Negotiated real commercial contracts and knows how to take a position, defend it, and close
• Gives practical advice that moves deals forward and is solution oriented
• Genuine curiosity about carbon capture, industrial decarbonization, and the commercial landscape Mantel is operating in
• Comfortable being Mantel's primary legal voice on commercial matters in a company where the legal function is still being built

Responsibilities

• Own Mantel's commercial contracts end-to-end: draft, negotiate, and close MSAs, NDAs, engineering service agreements, term sheets, licensing agreements, offtake agreements, strategic supply agreements, strategic partnership agreements and project-level commercial contracts
• Take and defend clear positions on representations and warranties, indemnification, liability caps, IP ownership & governance, and dispute resolution - and know when to hold firm and when to negotiate
• Develop and maintain standard form agreements and negotiation playbooks that keep Mantel's contracting process efficient and consistent
• Maintain a clean contracts repository and ensure Mantel's obligations, rights, and key dates are tracked and enforced
• Develop and manage external counsel relationships where specialized expertise is needed, keeping scope and cost tight
• Contribute to the strategic framing of commercial deals, not just the legal terms, but the structure, risk allocation, and commercial logic behind them
• Help Mantel build scalable commercial structures as the company moves from demonstration to full deployment
• Support due diligence processes for partnerships, project financing, and government grants
• Serve as a trusted, accessible internal legal resource across the organization - fast, practical, and easy to work with
• Work closely with the commercial, engineering, and finance teams to understand the deals Mantel is pursuing and the legal risks that actually matter
• Draft and negotiate term sheets that set the right commercial and legal foundation before full agreements are executed
• Own Mantel's licensing strategy from a contracts and legal perspective — understanding how IP rights, exclusivity provisions, grant-back clauses, and royalty structures interact with commercial objectives
• Identify and push back on terms that create undue legal risk or limit Mantel's flexibility as the business scales

Benefits

• Highly competitive pay based on experience, including equity
• 90% subsidized medical and dental healthcare coverage for employees, 50% for dependents
• Unlimited vacation policy
• Mental health personal days
• Generous sick leave
• A week-long winter break at the end of December
• Health/Fitness stipend
• Cell phone stipend
• Paid parental leave

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Ph.D. or professional degree