# Poseidon Aerospace

> Poseidon Aerospace is a San Francisco startup building unmanned cargo aircraft designed to move heavy loads to places without runways. Founded in 2024 by ex-Amazon engineer David Zagaynov and ex-Lockheed Martin engineer Parker Tenney, the company is developing two purpose-built autonomous platforms - Egret, a short takeoff and landing aircraft, and Heron, an amphibious seaplane - each engineered to carry up to two tons roughly 1,500 miles. Backed by an $11M seed round led by Tamarack Global, Poseidon aims to slash the cost-per-ton-mile of air logistics for both commercial feeder routes and contested military supply missions, with first full-scale flight tests targeted for mid-2026.

- **Founded:** 2024
- **Headquarters:** San Francisco, California, United States
- **Founders:** David Zagaynov (CEO & Co-Founder (former Amazon engineer)), Parker Tenney (CTO & Co-Founder (former Lockheed Martin engineer))
- **Team size:** ~27 employees
- **Products:** Egret, Heron, Seagull
- **Notable:** Closed an $11M seed round led by Tamarack Global in November 2025., Completed development and flight of the quarter-scale Seagull prototype (13-ft wingspan)., Signed a CRADA with the Naval Surface Warfare Center, Panama City Division.

## Products & services

- **Egret** — An unmanned short takeoff and landing (STOL) aircraft optimized for cargo operations in remote environments with unfinished runways and constrained landing zones. Roughly 50-foot class, designed to carry up to 2 tons with a range near 1,500 miles.
- **Heron** — An unmanned amphibious seaplane designed to operate from water, remote coastlines, and austere environments without traditional runways. Reported ~51-foot wingspan, 436 cubic feet of storage, up to ~2-ton (3,500 lb) payload and roughly 1,550 nautical mile range.
- **Seagull** — A 13-foot wingspan, quarter-scale prototype used to validate the flight concept, with a payload capacity of roughly 45-100 lbs and ~110-120 mile range using low-altitude ground-effect flight. Targeted for early testing with the U.S. Navy and U.S. Coast Guard.

## Achievements

- Closed an $11M seed round led by Tamarack Global in November 2025.
- Completed development and flight of the quarter-scale Seagull prototype (13-ft wingspan).
- Signed a CRADA with the Naval Surface Warfare Center, Panama City Division.
- Drew U.S. Navy and Coast Guard interest for contested-logistics testing.
- Built a three-site operation (San Francisco HQ, Washington D.C. office, Brunswick, Maine manufacturing) within roughly a year of founding.

## Latest updates

- **2026-03** — National Defense Magazine profiles Poseidon's autonomous amphibious logistics aircraft, detailing Heron specs and a mid-2026 flight-test target.
- **2025-11** — Announced $11M seed round led by Tamarack Global to develop and manufacture the Egret and Heron cargo aircraft.
- **2025-06** — Reports emerge that the U.S. Navy is preparing to test the Poseidon Seagull cargo drone for stealth logistics in contested waters.

## Links

- Website: https://poseidonaero.com
- LinkedIn: https://www.linkedin.com/company/poseidon-aerospace
- Twitter/X: https://x.com/poseidonaero
- YouTube: https://www.youtube.com/@PoseidonAerospace

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Published by YesPress — https://yespress.io
Last updated: 2026-07-03