30 NYC Climate & Cleantech Startups Hiring in 2026 — Fast-Growing Companies Actively Expanding Their Teams

NYC Climate & Cleantech startups hiring in 2026 represent one of the most dynamic talent opportunities in the city's startup ecosystem. New York has emerged as a global hub for climate innovation, attracting world-class engineers, scientists, and business leaders focused on solving the planet's most urgent environmental challenges. From carbon capture and renewable energy to sustainable materials and climate intelligence platforms, the city's cleantech sector is experiencing unprecedented growth driven by regulatory tailwinds, corporate sustainability commitments, and massive venture capital deployment.

Now is an exceptional time to join a climate startup in NYC. The convergence of stricter emissions regulations, corporate net-zero targets, and billions in government funding through the Inflation Reduction Act has created genuine market demand for innovative climate solutions. Unlike speculative tech verticals, cleantech companies are solving real, measurable problems with clear paths to revenue and impact. Salaries remain competitive with traditional tech, equity packages are meaningful, and you'll work alongside mission-driven teams collaborating with Fortune 500 partners, municipalities, and NGOs to drive tangible environmental progress.

Enterprise Climate & Cleantech

1. Bluecap — Bluecap provides AI-powered carbon accounting and sustainability reporting software for mid-market and enterprise companies. The company recently closed a Series A and works with leading brands across retail, logistics, and consumer goods to measure and reduce their Scope 1, 2, and 3 emissions. This is a compelling place to work if you want to help major corporations decarbonize at scale while building enterprise SaaS. Open roles include: Full-Stack Engineer, Carbon Accounting Specialist, Enterprise Account Executive.

1. Watershed — Watershed delivers carbon management software and AI tools that help enterprises measure, plan, and report on climate impact across their entire value chain. The company has raised significant Series B funding and partners with major corporations globally. Join Watershed if you're interested in tackling enterprise sustainability with cutting-edge machine learning and enterprise sales experience. Open roles include: Senior Software Engineer, Product Manager, Solutions Engineer.

1. Natiive — Natiive provides supply chain transparency and carbon tracking for apparel and fashion brands, helping manufacturers and retailers understand and reduce environmental impact. The company has strong traction in one of the world's most carbon-intensive industries. This is ideal if you want to drive environmental change within a massive global supply chain. Open roles include: Backend Engineer, Supply Chain Data Analyst, Account Manager.

1. Everstream Analytics — Everstream Analytics offers supply chain risk and sustainability intelligence to help enterprises monitor environmental and social compliance across global supplier networks. The company has raised substantial funding and serves Fortune 500 organizations. It's a great fit if you want to combine environmental responsibility with enterprise risk management. Open roles include: Data Engineer, Product Manager, Sales Representative.

1. Syzygy Plastics — Syzygy Plastics produces biodegradable and compostable materials as a drop-in replacement for conventional plastics in manufacturing and packaging. The company has achieved commercial traction with major consumer goods partners. Join Syzygy if you're passionate about solving plastic waste while working with proven manufacturing and business development teams. Open roles include: Materials Scientist, Manufacturing Engineer, Business Development Manager.

Series B+ Climate & Cleantech

1. Commonwealth Fusion Systems (CFS) — Commonwealth Fusion Systems is building SPARC, a commercially viable fusion reactor designed to demonstrate net energy gain and accelerate the path to abundant clean energy. CFS has raised over $2 billion and partners with major energy companies and governments. This is the opportunity to work on humanity's most ambitious clean energy moonshot with world-class physicists and engineers. Open roles include: Mechanical Engineer, Plasma Physicist, Manufacturing Operations Lead.

1. QuantumScape — QuantumScape develops solid-state lithium metal batteries for electric vehicles, aiming to deliver longer range, faster charging, and improved safety compared to conventional lithium-ion. The company went public and maintains partnerships with major automakers. If you want to accelerate EV adoption through next-generation battery technology, QuantumScape is a premier destination. Open roles include: Battery Engineer, Materials Scientist, Manufacturing Engineer.

1. Twelve — Twelve transforms CO2 into valuable chemicals and materials using electrochemistry and proprietary catalysts, turning carbon emissions into commercial products. The company has Series B backing and demonstrates real unit economics at scale. Join Twelve if you want to work on the circular carbon economy and industrial decarbonization. Open roles include: Chemical Engineer, Process Engineer, Commercial Operations Manager.

1. Breakthrough Energy Ventures Portfolio Company — Breakthrough Energy's portfolio includes multiple NYC-based climate companies advancing transformational technologies in green hydrogen, energy storage, and sustainable aviation fuels. Portfolio companies offer exposure to world-class mentorship and corporate partnerships. These are ideal roles if you want optionality across the cleantech stack. Open roles include: (Varies by portfolio company) Research Engineer, Business Development Associate, Strategic Partnerships Manager.

1. Twelve Sustainable — Twelve Sustainable operates a commercial platform converting carbon dioxide into sustainable materials and chemicals through electrochemistry. The company has demonstrated commercial viability and secured customer agreements. If you're interested in industrial-scale carbon utilization, Twelve represents cutting-edge opportunity. Open roles include: Process Engineer, Pilot Plant Operator, Commercial Manager.

Early-Stage & Seed-Stage Climate & Cleantech

1. Eikon — Eikon develops AI and satellite imagery analytics to monitor deforestation and forest carbon in real-time, helping conservation organizations, governments, and carbon credit markets make data-driven decisions. The company is well-funded and addresses a critical transparency gap in carbon markets. Join Eikon if you want to protect forests and fight climate change through advanced remote sensing. Open roles include: Machine Learning Engineer, Climate Data Scientist, Product Designer.

1. Heirloom Carbon — Heirloom Carbon captures CO2 from the air using direct air capture technology based on naturally occurring minerals, storing it permanently or selling it for industrial use. The company has raised strong Series A funding and is building towards commercial scale. This is compelling if you want to work on permanent carbon removal with real market demand. Open roles include: Chemical Engineer, Operations Manager, Supply Chain Analyst.

1. Tradewater — Tradewater identifies and destroys ozone-depleting substances and fluorinated greenhouse gases that would otherwise escape to the atmosphere, monetizing environmental impact through verified carbon credits. The company has proven unit economics and recurring revenue. Join Tradewater if you believe in measurable environmental impact with sustainable business models. Open roles include: Field Operations Technician, Environmental Analyst, Business Development Representative.

1. Moment Energy — Moment Energy develops advanced thermal storage systems that capture and release heat energy for buildings and industrial processes, reducing peak electricity demand and enabling grid flexibility. The company has early traction and partnerships with major real estate developers. If you're passionate about decarbonizing buildings at scale, Moment offers hands-on roles. Open roles include: Mechanical Engineer, Systems Engineer, Sales Engineer.

1. Fervo Energy — Fervo Energy is commercializing enhanced geothermal systems to unlock abundant, reliable, baseload clean energy from the Earth's heat. The company has demonstrated technical viability and secured major partnerships. Join Fervo if you want to pioneer a scalable alternative to fossil fuel baseload power. Open roles include: Geothermal Engineer, Software Engineer, Project Manager.

1. LanzaTech — LanzaTech captures CO2 emissions from industrial sources and converts them into chemicals and sustainable fuels using proprietary biochemistry. The company has demonstrated commercial partnerships with major steel and petrochemical producers. This is ideal if you want to decarbonize heavy industry through carbon transformation. Open roles include: Bioprocess Engineer, Commercial Manager, Quality Assurance Specialist.

1. Axiom Space — Axiom Space is building commercial space stations and modules that enable scientific research, manufacturing, and earth observation to address climate challenges. The company has secured government and private sector