Foley Hoag LLP
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Foley Hoag LLP garners plaudits for possessing ‘very dedicated staff with deep knowledge of the climate tech space’. Alongside this strength, the bench of experts at the firm is sought out in the technology, life sciences, and energy sectors. In Boston, Patrick Connolly continues to counsel companies on formation, venture capital financing, and M&A matters. Spearheading the department alongside Connolly, Sara Mattern in Washington DC is a go-to for both emerging companies and investors, and specializes in advising renewable energy companies. Mark Haddad has seen recent activity advising on capital raises on the West Coast. Brendan Burke is another key contributor to the practice.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘They have very dedicated staff with deep knowledge of the climate tech space. Sara Mattern and Mark Barnett, in particular, are standout attorneys - and I always reach out to them when I have complex transaction questions. ’
‘Sara Mattern and Mark Barnett in particular are standout attorneys - and I always reach out to them when I have complex transaction questions. They are climate tech legal experts. ’
Key clients
- Grantham Foundation (Neglected Climate Opportunities)
- Form Health
Work highlights
Advised Celesta Capital in its investments in two Series A financings: $25 million Series A financing of PowerLattice Technologies and $16.6 million Series A financing.


