# Keith Rumjahn

> Keith Rumjahn is a seed investor at Oliver Wyman backing Web3 and Computer. See 2 investments, check sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Fund: Oliver Wyman
- Location: Hong Kong, Hong Kong
- Total investments: 2
- Last investment: Apr 2022
- Lead investor: 50%
- Last updated: Oct 2026
- LinkedIn: https://www.linkedin.com/in/rumjahn
- X (Twitter): https://twitter.com/krumjahn

Keith Rumjahn is a Founder & CEO at CoachBase.

## Contacts

5 contacts available for Keith Rumjahn: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/keith-rumjahn?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Web3 | 1 | 50% |
| Computer | 1 | 50% |
| PC Games | 1 | 50% |
| Advertising | 1 | 50% |
| Video Games | 1 | 50% |

6 industries tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Singapore | 1 | 50% |
| United States | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Joyn | Joyn is a collaborative platform designed to support the large-scale co-creation of Web3 media. | $3.5M | Seed | Apr 07, 2022 | https://www.joyn.xyz/ |
| DEFY Labs | DEFY Labs is the game studio behind DEFY: the next-generation location-based RPG mobile game.The year is 2049. Players join the revolutionary hacker organisation “DEFY” to disrupt Future Systems, a huge corrupt corporation that controls the world. Become a righteous bandit and help save the world. The next-generation location-based RPG mobilegame DEFY has begun. | $3.5M | Seed | Apr 07, 2022 | https://defydisrupt.io/ |

2 of 2 investments shown.

## Co-investors
- [Bixin Ventures](https://shizune.co/investors/profile/bixin-ventures) — VC Fund, 2 deals together
- [Akatsuki Games Inc.](https://shizune.co/investors/profile/akatsuki-3) — VC Fund, 1 deal together
- [Animoca Brands](https://shizune.co/investors/profile/animoca-brands-corporation) — VC Fund, 1 deal together
- [Axia8 Ventures](https://shizune.co/investors/profile/axia8-ventures) — VC Fund, 1 deal together
- [ConsenSys](https://shizune.co/investors/profile/consensus-systems) — VC Fund, 1 deal together
- [GameFi Ventures](https://shizune.co/investors/profile/gamefi-ventures) — VC Fund, 1 deal together

## About Oliver Wyman

VC Fund · New York, United States

With offices in 50+ cities across 25 countries, Oliver Wyman is a leading global management consulting firm that combines deep industry knowledge with specialized expertise in strategy, operations, risk management, and organization transformation. The firm's 3,000 professionals help clients optimize their businesses, improve their operationsand risk profile, and accelerate their organizational performance to seize the most attractive opportunities.

5 contacts available at Oliver Wyman.

| Name | Title | Profile |
| --- | --- | --- |
| Jamie Macgregor | Partner | — |
| Junyi Zhang | Partner Managing Partner | — |
| Nancy Cieri | Executive Assistant to Partner | — |
| Aaron Fine | Partner, Americas Head of Capabilities | — |
| Abhishek Menon Ramachandran | Consultant | — |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund

## FAQ

### What does Keith Rumjahn invest in?

Keith Rumjahn invests primarily in Web3, Computer and PC Games startups, most often at Seed stage. Most of the 2 investments tracked by Shizune back companies in Singapore. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Keith Rumjahn?

Public channels for Keith Rumjahn include LinkedIn and X (Twitter). 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 Keith Rumjahn last invest?

The most recent investment recorded for Keith Rumjahn closed in Apr 2022. Shizune tracks 2 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

# About Shizune
Shizune.co is an investor database. Core features:
- 48,091 startup investors (angels, VCs, accelerators, and others)
- Email, phone, LinkedIn (for intros), socials, and other contact data
- Updated daily from public funding news
- CSV and Excel export

The User can access the full database FOR FREE after signing up: shizune.co