# Jason Cahill

> Jason Cahill is a Series A investor at Earth Foundry (Brooklyn) backing iOS and Apps. See 1 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Earth Foundry](https://shizune.co/investors/profile/earthfoundry)
- Location: Brooklyn, United States
- Total investments: 1
- Last investment: Mar 2017
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/jason-cahill-0271b012/
- X (Twitter): https://twitter.com/cahill_mc
- Website: https://www.carbonventures.vc/

Jason Cahill is a Series A investor at Earth Foundry in Brooklyn focused on iOS and Apps. Jason Cahill helps lead Earth Foundry’s sourcing, due diligence, investment analysis, and portfolio engagement work, engaging with company leadership, boards, and external advisors. From working with large tech companies to startups to government agencies, Jason has worked across multiple sectors including energy, transportation, and the builtenvironment. Prior to joining Earth Foundry, Jason held various roles across the climate tech value chain, from founding AWS’s Sustainable Cities program which drives meaningful impact between large corporates and tier-1 cleantech startups, to building a VC firm investing at the intersection of advanced technologies(AI, robotics, and machine learning) and climate, to founding a tech company focused on transportation optimization. Jason also served for 15 years in the US Army Special Forces, then later as a consultant for multiple government and defense industry clients. Jason has advised companies operating in the cleantech domain across a wide range of needs, from go-to-market strategy, fundraising, and product development to growth, sales, and operations. Jason is an Adjunct Professor at Columbia University’s School of Engineering and Applied Science, where he teaches a cross-disciplinary course on entrepreneurship aimed at solving defense and government-related challenges. He earned an MBA from Carnegie Mellon University and a BS in Information Systems Management from the University of Maryland.k

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| iOS | 1 | 100% |
| Apps | 1 | 100% |
| Mobile | 1 | 100% |
| Android | 1 | 100% |
| Real Estate | 1 | 100% |

6 industries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Roomi | Roomi is a free mobile platform that helps people find flexible, affordable co-living solutions. Roomi is a peer-to-peer shared housing marketplace making it safer and easier to rent rooms and find roommates. They are one of the only platforms that does not aggregate listings. Every room rental posted on their platform is user-generated andverified by the Roomi team. Users are able to easily list their empty rooms and potential roommates can browse and apply to move in. | $11M | Series A | Mar 31, 2017 |  |

1 of 1 investments shown.

## Co-investors
- [Atami Capital](https://shizune.co/investors/profile/atami-capital) — VC Fund, 1 deal together
- [DCM Ventures](https://shizune.co/investors/profile/dcm) — VC Fund, 1 deal together
- [Great Oaks Venture Capital](https://shizune.co/investors/profile/great-oaks-venture-capital) — VC Fund, 1 deal together
- [Rosecliff Ventures](https://shizune.co/investors/profile/rosecliff-ventures) — VC Fund, 1 deal together
- [Sand Hill East](https://shizune.co/investors/profile/sand-hill-east) — VC Fund, 1 deal together
- [Townsquare Media](https://shizune.co/investors/profile/townsquare-media) — VC Fund, 1 deal together

## About Earth Foundry

VC Fund · Chicago, United States

Energy Foundry invests venture capital in today’s most promising energy innovators, and we work with the world’s leading energy companies to build and scale new ventures. Our approach merges venture capital with the perks of partnership, and includes an arsenal of essential tools and relationships to help bring great ideas to market.

5 contacts available at Earth Foundry.

| Name | Title | Profile |
| --- | --- | --- |
| Bob Greenlee | General Counsel | https://shizune.co/investors/profile/bob-greenlee |
| Jason Blumberg | Co-Founder & Managing Director | https://shizune.co/investors/profile/jason-blumberg |
| Jimmy Jen | Associate | https://shizune.co/investors/profile/jimmy-jen-bec8 |
| Judy Li | Vice President | https://shizune.co/investors/profile/judy-li |
| Matt VanHoeven | CFO (part-time) | https://shizune.co/investors/profile/matt-vanhoeven |

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### Similar stage
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## FAQ

### What does Jason Cahill invest in?

Jason Cahill invests primarily in iOS, Apps and Mobile startups, most often at Series A stage. Most of the 1 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Jason Cahill last invest?

The most recent investment recorded for Jason Cahill closed in Mar 2017. Shizune tracks 1 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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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