Seattle-Tacoma International Airport SEA / KSEA

Airport ground services (ramp/passenger) at SEA; Swissport has served airlines at SEA since 1987

Ramp, baggage and ground services at SEA, primarily for Delta Air Lines; SEA is one of Unifi's largest stations. Still listed on Port of Seattle cargo-services page under legacy name Delta Global Services

Largest into-plane fueler at SEA (~70% of flights); fuels Alaska, American, Delta and United under contract — confirmed by May 2025 Teamsters Local 174 strike-authorization coverage

Into-plane fueling/defueling at SEA with fuel trucks, hydrant carts and stationary carts (per Menzies SEA station page)

Dedicated aircraft de-icing provider at SEA using forced-air plus glycol trucks; contracted by Alaska Airlines; actively recruiting SEA deicers for 2025-26 winter season

Delta line maintenance station at SEA (operations center opened 2013, ~76 technicians cited) plus hangar adjacent to the South Satellite; primarily supports Delta's own SEA hub fleet rather than third parties

Hydraulics/pneumatics shop — actuation systems, actuators, gearboxes, transmissions, air-cycle machines, starters and valves overhauled/tested at ATS's dedicated Components facility (2600 W Casino Rd, Everett, WA / Paine Field, ~30 mi N of SEA, same Seattle metro area); FAA and EASA Part 145 certified; ships ~15,000 components/yr to 250+ customers.

Composite/structures/sheet-metal shop — flight-control surfaces, nacelles, doors, radomes and winglets, including complex composite repair; FAA/EASA Part 145 certified; located at Everett, WA (Paine Field).

Electrical accessory/fuel accessory/wire-harness shop — wire harnesses, motors, lighting and window-heat control units, plus fuel-system accessories; FAA/EASA Part 145 certified.

NDT — in-house heat-treat and non-destructive inspection (NDI) supporting the components shop; FAA/EASA Part 145 approved, exact class rating unconfirmed.

Propeller shop — propeller overhaul and repair; only commercially licensed repair station for C-130/P-3 54H60 propeller systems; FAA Part 145 and EASA certified, AS9100/ISO9001, US Navy source approval. Located 5802 S 228th St, Kent, WA, ~9 mi SE of SEA.

Propeller shop — holds FAA Part 145 Propeller Class 1, 2, and Limited ratings. Located 925 S Nebraska St, Seattle, WA, near Boeing Field, ~9 mi N of SEA.

NDT — holds FAA Part 145 Limited Nondestructive Testing rating.

Electrical accessory/fuel accessory shop — holds FAA Part 145 Accessory Limited rating; specific accessory types unconfirmed.

Electrical accessory/fuel accessory shop — holds FAA Part 145 Accessory Limited and Airframe Limited ratings with EASA UK bilateral recognition; exact accessory scope unconfirmed. Located 20014 70th Ave S, Kent, WA, ~9 mi SE of SEA.

Avionics/instrument shop — bench repair under FAA Part 145 Instrument Class 2, 3, 4 and Radio Class 1, 2, Limited ratings; EASA UK bilateral. Located 23413 66th Ave S, Kent, WA, ~9 mi SE of SEA.

Electrical accessory/fuel accessory shop — holds FAA Part 145 Accessory Class 2, 3 and Airframe Limited ratings.

Composite/structures/sheet-metal shop — primarily an OEM manufacturer of formed titanium/exotic-metal engine nacelle and exhaust ducting that also holds FAA Part 145 Airframe Limited and Powerplant Limited repair ratings. Located 5411 S 226th St, Kent, WA, ~9 mi SE of SEA.

NDT — holds FAA Part 145 Limited Nondestructive Testing rating.

Electrical accessory/fuel accessory shop — holds FAA Part 145 Accessory Limited rating for aircraft spring/mechanical accessory components; exact component scope unconfirmed. Located 425 S 7th St, Renton, WA, ~11 mi NE of SEA.

Electrical accessory/fuel accessory shop — holds FAA Part 145 Accessory Limited rating; exact component scope unconfirmed. Located 659 Strander Blvd Bldg F, Tukwila, WA, ~5 mi N of SEA (closest independent shop found to the airport).

Avionics/instrument shop — holds FAA Part 145 Instrument Limited and Radio Limited ratings; general-aviation focused. Located 289 E Perimeter Rd, Renton, WA, ~11 mi NE of SEA.

Engine shop — holds FAA Part 145 Powerplant Limited rating; general-aviation piston/turbine scale, not airline-scale overhaul.

Avionics/instrument shop — avionics installations/upgrades plus RVSM, FAR 91.411-413 and ELT compliance checks, pitot-static/transponder certification testing, and flight-data-recorder downloads for business aircraft; FAA CRS and EASA approved (business-aviation focused, not airline-scale). Located 7023 Perimeter Rd Suite 110, Seattle, WA, at Boeing Field, ~9 mi N of SEA.

Flight kitchen at 2358 S 154th St, SeaTac serving airlines at SEA (clients include Alaska Airlines); actively hiring in 2025-26. Note: older 18850 28th Ave S site shows as closed

Flight kitchen in SeaTac with ~400 staff producing ~5,800 meals/day for multiple airlines at SEA (~160 departures/day served)

Aircraft cabin cleaning/janitorial within its SEA service portfolio

Operates air cargo warehouse at 16745 Air Cargo Rd (general and special cargo); listed by Port of Seattle as a SEA cargo handler with 2025 handling tariff in effect · Warehouse Mon-Sat 08:00-17:00, Sun 08:00-15:30 (per Swissport SEA cargo tariff; not independently re-verified)

Menzies Aviation Cargo Division listed by Port of Seattle as a SEA cargo handler; Air Menzies International (AMI) wholesale air freight also on-site

Cargo terminal handling at 2380 S 166th St; listed by Port of Seattle among SEA cargo handlers and a WFS express/e-commerce regional hub

Sole FBO on the field at SEA: GA/corporate handling, jet fueling, ramp parking, GPU, passenger terminal/lounge; active as of mid-2026 (fuel prices posted July 2026)