Founder Profile
Doug Mahon
Last reviewed: October 2026 · By Swet Parvadiya
Who is Doug Mahon?
Doug Mahon is a founder of Seagate Technology Holdings plc, which was founded in 1979 with Alan Shugart, Finis Conner, Syed Iftikar and Tom Mitchell.
- Company founded
- Seagate Technology Holdings plc
- Founded
- 1979
- Co-founders
- Alan Shugart, Finis Conner, Syed Iftikar and Tom Mitchell
Background
American engineer and entrepreneur.
Founding Story
Doug Mahon co-founded Seagate Technology in 1979. Bringing absolutely critical electrical engineering expertise to the founding team, he helped design the internal circuitry for the legendary ST-506, the world's very first 5.25-inch hard disk drive, which completely revolutionized the early microcomputer industry. (Exact birth year remains publicly undisclosed).
Sources
This profile does not yet cite a source specific to Doug Mahon. The sources below document the company company rather than the person, so check them against the claims above.
- Seagate FY2026 results (Seagate Technology Holdings plc)
- Seagate FY2025 results (Seagate Technology Holdings plc)