unequivocally good for people for the planet

Only people, working together at scale, will end our climate crisis. When we act boldly, intentionally, and prioritize equity, we empower our communities and create lasting processes that lead to global, systemic change.

About Cambium Carbon

Cambium Carbon is a people-centric, forward-focused company transforming the way communities and organizations approach the climate crisis. We believe in actions that drive results, and we are unapologetically committed to sharing the stories of our results with the world. Our stories are about impact and we believe impact inspires others to action.

The Cambium Culture

We are a values driven organization. We believe diversity of thought, background, and experience creates a strong, empathetic, and resilient culture. We’re a team of tree nerds, runners, technologists, artists, woodworkers, and foodies working everyday to make each other better and create lasting, equitable change at scale.

Cambium Values

  • Listen First
  • Unequivocally Good
  • Scalable Climate Impact
  • Unapologetically Growth-Oriented
  • Execute Exceptionally

meet the team

Broad expertise and a shared mission.

Ben Christensen | Co-founder, CEO

Ben has spent his career building teams—believing deeply in the power of people, listening, and acting for others. He started Cambium Carbon to create a new people-first way to address climate change at scale in the US. Ben earned his Masters of Environmental Management from the Yale School of Forestry and Environmental Studies. Previously he worked on federal policy at the World Resource Institute, led backcountry trips across California, and researched hydrolysis nano-chemistry at Sandia National Lab.

Marisa Repka | Co-founder, CFO

Marisa spearheads tree planting initiatives and makes sure the books at Cambium Carbon keep our lights on. She connects the independent pieces of the urban wood system to facilitate relationship building and maximize community impact.

Marisa holds a Masters of Environmental Management with a specialization in Business from the Yale School of Forestry and Environmental Studies. Her work as a writer and student program manager for the Conservation Finance Network has developed her interest in building new financing models for environmental impact.

Theo Hooker | Co-founder, COO

Theo wears many hats at Cambium. His bias toward action includes everything from managing workflows to building lasting relationships with our partners. His energy helps make this well-oiled team work as seamlessly as possible.

Theo’s background in sustainable business and development allows him to view potential climate change solutions through a market lens. Prior to Cambium, he traveled the world as a Thomas Watson fellow exploring sustainable food systems building valuable skills that translate well to a start-up environment.

Sofia Reitsma | Operations Director

Sofia’s background is in computational pathology, cultivating a skill set for systems-analysis and process-improvement. This combination of skills pairs perfectly with her passion for environmental sustainability. Sofia shares her collaborative and adaptive mindset with the Cambium Carbon team and our partners. She holds a B.S. in biology. 

Jeff Cohen | VP of Sales

Jeff leads Cambium Carbon’s mission to make Carbon-Smart Wood™ a global phenomenon. Previously, Jeff consulted and directed for smart home brands in the residential construction industry for more than a decade. His sales acumen, proven ability to foster long-term relationships, and passion for leaving the world a better place for his children bolsters his ability to lead Cambium’s growth goals. Cambium’s team and impact-driven model for a successful, scalable business is what enables Jeff to bring his best self to the role every day. Jeff holds an MBA, with a focus in Sustainability, from the Yale School of Management.

Joe McDonald | VP of Technology, Interim CTO

Joe joins Cambium Carbon with over a decade of experience working for startup and growth-stage technology companies, as well as a brief stint in academia. Joe believes in using technology to solve complex business problems, to empower people to focus on the things that matter, and to take way too many pictures of his daughter, wife, and dogs. Joe holds a BA from Hobart College and is currently pursuing a Masters degree at Dartmouth College. 

Ben Christensen | Co-founder, CEO

Ben has spent his career building teams—believing deeply in the power of people, listening, and in dreaming big. He started Cambium Carbon to create a new way to address climate change at scale in the US. He is dedicated to scaling carbon removal implementation through novel finance and social mechanisms. Ben earned his Masters of Environmental Management from the Yale School of Forestry and Environmental Studies.

Marisa Repka | Co-founder, CFO

Marisa spearheads tree planting initiatives and makes sure the books at Cambium Carbon keep our lights on. She connects the independent pieces of the urban wood system to facilitate relationship building and maximize community impact.

Marisa holds a Masters of Environmental Management with a specialization in Business from the Yale School of Forestry and Environmental Studies. Her work as a writer and student program manager for the Conservation Finance Network has developed her interest in building new financing models for environmental impact.

Theo Hooker | Co-founder, COO

Theo wears many hats at Cambium—from managing workflows to building lasting relationships with all of our partners. His energy helps make this well-oiled team work as seamlessly as possible.

Theo’s background in mathematical economics allows him to view potential climate change solutions through a market lens. As a 2018 Thomas Watson fellow, he traveled the world exploring sustainable food systems building valuable skills that translate to a start-up environment.

Sofia Reitsma | Operations Director

Sofia’s background is in computational pathology, cultivating a skill set for systems-analysis and process-improvement. This combination of skills pairs perfectly with her passion for environmental sustainability. Sofia shares her collaborative and adaptive mindset with the Cambium Carbon team and our partners. She holds a B.S. in biology. 

Jeff Cohen | VP of Sales

Jeff leads Cambium Carbon’s mission to make Carbon-SmartWood a household name. His sales acumen, ability to build and foster relationships, and passion for leaving the world a better place for his children make him the perfect person to lead this initiative. Jeff holds an MBA from the Yale School of Management.   

Joe McDonald | VP of Technology, Interim CTO

Joe joins Cambium Carbon with over a decade of experience working for startup and growth-stage technology companies, as well as a brief stint in academia. Joe believes in using technology to solve complex business problems, to empower people to focus on the things that matter, and to take way too many pictures of his daughter, wife, and dogs. Joe holds a BA from Hobart College and is currently pursuing a Masters degree at Dartmouth College. 

Careers at Cambium

We actively hire and develop the best talent, because saving our planet requires the most diverse, dedicated, and driven people. We constantly invest in the growth of our team as individuals and professionals. 

People gravitate to Cambium Carbon because our work resonates with them and our approach to our work empowers team members to take ownership of their roles. Ready to see if you have what it takes to be part of the climate-super team?