# Leif Welch

> Leif Welch is the founder and CEO of JamLoop, a connected-TV advertising platform serving brands and agencies across the United States. His background includes Cox Digital Solutions, Adify and AdMission, degrees in engineering and economics from the University of Pennsylvania, and a Kellogg MBA. A longtime guitarist, he first used the JamLoop name for a musicians’ marketplace and later drove Uber on the side for two years while building the business.

- **Role:** Founder and CEO at JamLoop
- **Organizations:** JamLoop, Cox Digital Solutions, Adify, AdMission, IPIX, AltaVista
- **Education:** BSE, Systems Engineering, University of Pennsylvania, BA, Economics, University of Pennsylvania, MBA, Northwestern University - Kellogg School of Management
- **Known for:** Co-founded AdMission and served as chief revenue officer before its 2008 sale to the Cobalt Group., Built JamLoop’s connected-TV platform for smaller advertisers and agencies., Led JamLoop when it ranked No. 485 in the 2024 Deloitte Technology Fast 500 with 211% revenue growth.

## Career timeline

- **—** — Held roles at AltaVista, IPIX, AdMission, Adify and Cox Digital Solutions; exact dates not verified.
- **2008** — AdMission, where Welch was co-founder and chief revenue officer, was sold to the Cobalt Group.
- **—** — Started an early JamLoop marketplace for musicians to find equipment and connect locally; it lasted approximately a year.
- **—** — Drove Uber on evenings and weekends for two years while bootstrapping the business.
- **2018** — Launched JamLoop’s local connected-TV advertising platform.
- **2024** — JamLoop ranked 485th in Deloitte’s Technology Fast 500 with 211% revenue growth.
- **2025** — Discussed music, entrepreneurship, creative strategy and CTV on The Sonic Truth.
- **2026** — Discussed JamLoop’s 70/30 CTV planning framework in an eTail Boston interview.

## Achievements

- Co-founded AdMission and served as chief revenue officer before its 2008 sale to the Cobalt Group.
- Built JamLoop’s connected-TV platform for smaller advertisers and agencies.
- Led JamLoop when it ranked No. 485 in the 2024 Deloitte Technology Fast 500 with 211% revenue growth.

## Latest updates

- **2026-08** — Appeared on Talk Commerce in an interview recorded at eTail Boston, discussing JamLoop’s music-marketplace origins and its 70/30 CTV planning framework; episode published August 24.
- **2026-04** — Discussed outcome measurement, incrementality and mid-market advertisers in From Screen to Store; company interview recap published April 7.
- **2025-12** — Appeared on The Sonic Truth to discuss JamLoop’s evolution, creativity and performance advertising; Advertising Week published the episode December 22.

## Links

- Website: http://leifwelch.com
- LinkedIn: https://www.linkedin.com/in/leifwelch

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Profile page: https://yespress.io/leif-welch
Published by YesPress — https://yespress.io
Last updated: 2026-10-21