# James Monsees

> James Monsees is an American product designer, entrepreneur, investor and adviser best known for co-founding Ploom, Pax Labs and Juul with Adam Bowen. A Stanford graduate project begun in 2004 became a long-running hardware company, an influential product-design story and, eventually, a business tested by regulatory scrutiny and public controversy. Monsees left Juul in 2020 and is now listed by Siddhi Capital as an adviser, while working independently with companies on business and product strategy.

- **Role:** Advisor at Siddhi Capital; independent investor and business and product strategy advisor
- **Organizations:** Siddhi Capital, Juul Labs, Pax Labs, Ploom, Stanford d.school, Kenyon College
- **Nationality:** American
- **Education:** B.A. in Physics and Studio Art, Kenyon College, Graduate degree in Product Design (listed by Siddhi Capital as M.F.A.; other biographies describe an M.S.), Stanford University
- **Known for:** Co-founded Ploom, Pax Labs and Juul Labs with Adam Bowen., Helped turn a 2005 Stanford product-design thesis into a commercial hardware platform and multiple companies., Led Ploom as CEO from 2011 to 2015 and later served as chief product officer at Pax Labs and Juul Labs.

## Career timeline

- **2002-2003** — Worked as a product designer at Metaphase Design Group.
- **2004-2008** — Operated James Monsees Product Design, an independent consumer and technology product-design consultancy.
- **2005** — Presented the Ploom concept with Adam Bowen as a Stanford graduate product-design thesis.
- **2005-2006** — Served as a founding fellow at Stanford's Hasso Plattner Institute of Design, or d.school.
- **2007** — Co-founded Ploom and became chief operating officer and a board director.
- **2011-2015** — Served as Ploom's chief executive officer and a board director.
- **2012** — Ploom introduced PAX, a portable loose-leaf vaporizer.
- **2015-2017** — Served as chief product officer of Pax Labs; Juul launched in 2015.
- **2017-2020** — Served as co-founder and chief product officer of Juul Labs, later moving into an advisory role.
- **2018** — Altria bought a 35 percent stake in Juul for $12.8 billion, valuing the company at $38 billion.
- **2019** — Named with Adam Bowen to the TIME 100; testified before a congressional subcommittee about Juul's practices.
- **2020** — Stepped down as a Juul adviser and board member and began working as an independent investor and adviser.
- **2020-present** — Advises companies on business and product strategy; Siddhi Capital lists him as an adviser.

## Achievements

- Co-founded Ploom, Pax Labs and Juul Labs with Adam Bowen.
- Helped turn a 2005 Stanford product-design thesis into a commercial hardware platform and multiple companies.
- Led Ploom as CEO from 2011 to 2015 and later served as chief product officer at Pax Labs and Juul Labs.
- Named with Adam Bowen to the 2019 TIME 100.
- Monsees and Bowen had secured more than 100 patents between them by 2018, according to a joint interview.
- Juul reached a $38 billion valuation in 2018 after Altria paid $12.8 billion for a 35 percent stake, although that valuation later fell sharply.

## Latest updates

- **2026-09** — Siddhi Capital's current team page lists Monsees as an adviser and says he has worked as an independent investor and adviser since 2020.
- **2020-03** — Monsees stepped down from his Juul advisory role and board seat, ending his formal involvement with the company.

## Links

- LinkedIn: https://www.linkedin.com/in/jamesmonsees
- Twitter/X: https://x.com/james_monsees

---

Profile page: https://yespress.io/james-monsees
Published by YesPress — https://yespress.io
Last updated: 2026-09-26