# Karl Siebrecht

> Karl Siebrecht is the Seattle-based co-founder and CEO of Flexe, a technology-enabled logistics company that turns warehouse capacity into flexible infrastructure. A former U.S. Navy diving officer, Bain manager, aQuantive executive, and AdReady CEO, he has built a career around bringing software and operating discipline to large, stubbornly physical systems.

- **Role:** Co-founder and CEO at Flexe
- **Organizations:** Flexe, AdReady, aQuantive, Microsoft, EnergySavvy, Bain & Company, United States Navy
- **Education:** BA in Economics, Duke University, MBA, Tuck School of Business at Dartmouth
- **Known for:** Co-founded Flexe and helped establish on-demand warehousing as a logistics category., Led Flexe through a $119 million Series D in 2022 at a valuation above $1 billion., Won EY's 2019 Pacific Northwest Entrepreneur Of The Year award in the Business Services category.

## Career timeline

- **Before 1994** — Served four years as a diving officer in the United States Navy, working in areas that included salvage and ship repair.
- **1994-1996** — Earned an MBA from the Tuck School of Business at Dartmouth after completing a BA in economics at Duke University.
- **Late 1990s** — Worked at Bain & Company in Boston on strategic marketing and private-equity transactions.
- **1999** — Joined aQuantive, later holding leadership roles in analytics, product management, strategy and operations.
- **2006** — Appointed president of Atlas, aQuantive's advertising-technology business.
- **2007** — Became an executive in Microsoft's online services division after Microsoft acquired aQuantive for about $6 billion.
- **2009** — Became president and CEO of Seattle advertising-technology company AdReady.
- **2013** — Co-founded Flexe with Francis Duong and Edmund Yue, turning unused warehouse capacity into on-demand logistics infrastructure.
- **2019** — Won EY's Pacific Northwest Entrepreneur Of The Year award in the Business Services category.
- **2022** — Led Flexe through a $119 million Series D that valued the company at more than $1 billion.
- **2023-present** — Hosts Flexe's Logistics Leadership Podcast with Ben Dean, interviewing supply-chain operators and investors.

## Achievements

- Co-founded Flexe and helped establish on-demand warehousing as a logistics category.
- Led Flexe through a $119 million Series D in 2022 at a valuation above $1 billion.
- Won EY's 2019 Pacific Northwest Entrepreneur Of The Year award in the Business Services category.
- Ran Atlas at aQuantive before Microsoft's approximately $6 billion acquisition of the company.
- Built an executive career spanning military operations, consulting, advertising technology and logistics technology.

## Latest updates

- **2025-06** — Hosted a live Logistics Leadership Podcast conversation with Arizona State University professor Dale Rogers.
- **2025-03** — Hosted episodes on logistics M&A and artificial intelligence in the second season of the Logistics Leadership Podcast.
- **2025-02** — Co-hosted The Predictions Episode, covering geopolitics, automation, data visibility and flexible contracts in supply chains.
- **2025-01** — Discussed supply-chain resilience with Zero100 research leader Geraint John.

## Links

- Website: https://flexe.com
- LinkedIn: https://www.linkedin.com/in/karl-siebrecht-81188212/

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Profile page: https://yespress.io/karl-siebrecht
Published by YesPress — https://yespress.io
Last updated: 2026-09-27