Fifty-three firms, near-uniformly incorporated (40 of 42 stated) — clustered in engineering-design (16), civil and structural (10), metalwork fabrication (10), marine engineering (9), and project management (9). Vale, St Sampson, and St Peter Port hold 38 of the 53 — a harbour-and-industrial-estate belt. Oldest trading since 1924. —
Twenty-four firms — ten civil-structural consultancies, contractors, and steel fabricators — from Rihoy & Son (1924) to NSP (2010).
Sixteen of Guernsey's 51 engineering firms cover mechanical work — five fabrication shops, three M&E consultancies, two M&E contractors.
Twelve marine-engineering firms — eight in core marine work, with strong metalwork-fabrication and boat-repair clusters.
Eight of 51 engineering firms cover electrical work — two M&E consultancies, two NICEIC installers, three specialists, one wholesaler.
One firm per niche, picked for editorial depth.
Chartered engineers: structural, civil, geotechnical, environmental services.
Trade supplier of pipeline, heating & mechanical engineering products
Marine services and chandlery — fuel, repairs, clothing, and Suzuki dealer.
Mechanical & electrical contractor — HVAC, plumbing, fire, security, renewables
Tagged in Engineering but not in one of the specific niches above.