# David Casem

> David Casem is the co-founder and CEO of Telnyx, a communications and AI infrastructure company that began in 2009 as a call-system consultancy. A self-taught engineer with an economics degree from Swarthmore College, he helped build its network and now advocates integrating communications and AI infrastructure to deliver useful, responsive assistants.

- **Role:** Co-founder and CEO at Telnyx
- **Organizations:** Telnyx, Slingshot Consulting Group, North American Numbering Council
- **Nationality:** Polish
- **Education:** Bachelor of Arts in Economics, Swarthmore College
- **Known for:** Co-founded Telnyx and led its development from a consultancy into a carrier operating its own private IP network., Built Telnyx’s initial network using open-source software., Represented Telnyx as a voting member of the North American Numbering Council.

## Career timeline

- **Before 2009** — Founded Slingshot Consulting Group, working with Cisco and open-source telephony software.
- **2009** — Co-founded the business that became Telnyx with Ian Reither, initially installing call-center systems.
- **2010-2013** — Telnyx moved into reselling voice minutes and became a licensed telecommunications carrier.
- **2013** — Telnyx LLC incorporated and began switching and routing calls through its own software.
- **2014** — Telnyx participated in Techstars; Casem appeared on Bootstrapping in America in September.
- **2016** — Telnyx launched its Mission Control Portal and API and opened a Dublin headquarters.
- **2017** — Argued for wholesale-service access during the CenturyLink-Level 3 merger proceedings.
- **2020** — Telnyx launched Telnyx.org with platform credits and communications discounts for eligible social-impact organizations.
- **2023** — Telnyx nominated Casem for the Class C representative seat on the ATIS board.
- **2026** — Discussed AI missions on Bluejay’s Skywatch podcast and appeared at London Tech Week.

## Achievements

- Co-founded Telnyx and led its development from a consultancy into a carrier operating its own private IP network.
- Built Telnyx’s initial network using open-source software.
- Represented Telnyx as a voting member of the North American Numbering Council.
- Helped introduce software controls over communications through Telnyx’s portal and API.

## Latest updates

- **2026-10** — Telnyx’s author page lists a Python SDK supply-chain security notice under Casem’s byline, dated October 6.
- **2026-10** — A Telnyx model-serving article quotes Casem on frequent changes in model competition and describes switching models through a request field.
- **2026-06** — London Tech Week listed Casem for sessions on AI infrastructure, customer experience and specialized models.
- **2026-03** — Appeared on Bluejay’s Skywatch podcast to discuss AI missions, agent identity and voice infrastructure.

## Links

- Website: https://telnyx.com/
- LinkedIn: https://www.linkedin.com/in/dcasem
- Twitter/X: https://x.com/davidcasem

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Profile page: https://yespress.io/david-casem
Published by YesPress — https://yespress.io
Last updated: 2026-10-27