Joshua Posamentier
Co-Founder and Managing Partner @ Congruent Ventures
San Francisco, United States
Joshua Posamentier is a seed investor at Congruent Ventures in San Francisco focused on Environmental Engineering and Energy. Joshua Posamentier is Co-Founder and Managing Partner of Congruent Ventures. Joshua oversees Congruent’s investments in PolySpectra, Sense Photonics, Energetic Insurance, TeleSense, Bellwether Coffee, Xtelligent, ArcByt, Fox Robotics, and Emergy Labs.
- Total investments:
- 19
- Last investment:
- Lead investor:
- 37%
Last updated:
For AI agents: llms.txt
Industries Joshua Posamentier invests in
Stages Joshua Posamentier invests in
Countries Joshua Posamentier invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
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Investment Focus
Industry
- Environmental Engineering 3 (16%)
- Energy 2 (11%)
- Renewable Energy 2 (11%)
- Solar 1 (5%)
- Battery 1 (5%)
Stage
- Seed 5 (26%)
- Series A 5 (26%)
- Series B 4 (21%)
- Series C 1 (5%)
- Series D 1 (5%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Fluxco appears to be a transformer-focused infrastructure company. | $26M / Seed / Jul 23, 2026 | ||
| Fervo Energy is a next-generation geothermal developer generating clean power in new places. Fervo Energy commercializes proprietary technology to own, develop, and operate geothermal assets as the dispatchable foundation to a 100% clean energy future. | $462M / Series E / Dec 10, 2025 | ||
| Muon Space is an end-to-end space systems company that designs, builds, and operates mission-optimized satellite constellations to deliver critical data and enable real-time compute and decision-making in space. Its proprietary technology stack, Halo™, integrates advanced spacecraft platforms, robust payload integration and management, and apowerful software-defined orchestration layer to enable high-performance capabilities at unprecedented speed – from concept to orbit. With state-of-the-art production facilities in Silicon Valley and a growing track record of commercial and national security customers, Muon Space is redefining how critical Earth intelligence is delivered from space. | $44.5M / Series B / Jun 12, 2025 | ||
| Parallel Systems designs an autonomous, zero-emissions freight transportation system. The company believes the future of freight transportation should be fast, inexpensive, and clean, while also reducing congestion on the highways. Parallel Systems was founded in 2020 and is headquartered in Los Angeles, California. | $38M / Series B / Apr 14, 2025 | ||
| VEIR is a company developing a new approach to using high-temperature superconductors for electricity transmission. Its passive evaporative cryogenic cooling delivers 20 times the cooling power per kilogram of nitrogen flow compared to mechanical subcooling. | $75M / Series B / Jan 28, 2025 | ||
| Applied Carbon is scaling ground-breaking technology to regenerate soils and trap atmospheric carbon for the benefit of people and the world. | $21.5M / Series A / Jul 31, 2024 | ||
| Fervo Energy is a next-generation geothermal developer generating clean power in new places. Fervo Energy commercializes proprietary technology to own, develop, and operate geothermal assets as the dispatchable foundation to a 100% clean energy future. | $244M / Series D / Feb 29, 2024 | ||
| Lydian aims to accelerate the decarbonization of the chemical industry by electrifying the chemical production process. Founded in 2021 by Branko Zugic, Lydian is headquartered in | $12M / Seed / Sep 06, 2023 | ||
| VEIR is a company developing a new approach to using high-temperature superconductors for electricity transmission. Its passive evaporative cryogenic cooling delivers 20 times the cooling power per kilogram of nitrogen flow compared to mechanical subcooling. | $24.9M / Series A / May 25, 2023 | ||
| Robigo is a biomanufacturing company engineering microbes to create more sustainable crop protection solutions. | $6.9M / Seed / Feb 15, 2023 | ||
| See all 19 investments → | |||
Co-Investors
About Congruent Ventures
Congruent Ventures is a venture capital firm that seeks to invest in Mobility and Urbanization, Energy Transition, Food and Agriculture, and Sustainable Production & Consumption sectors. We look for technology companies that will positively impact our energy and resource consumption. If we see an opportunity to partner with a like-minded teamfocused on scale across hardware, software, or services, we’re interested.
Congruent Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Abe Yokell
Co-Founder and Managing Partner
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Nicholas Adeyi
Investor
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Tanuj Dutta
Partner
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Eliza Cushman
Partner
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Joshua Posamentier
Co-Founder and Managing Partner
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FAQ
What does Joshua Posamentier invest in?
Joshua Posamentier invests primarily in Environmental Engineering, Energy and Renewable Energy startups, most often at Seed and Series A stage. Most of the 19 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Joshua Posamentier?
Public channels for Joshua Posamentier include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Joshua Posamentier last invest?
The most recent investment recorded for Joshua Posamentier closed in Jul 2026. Shizune tracks 19 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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