Pewaukee, WI

Land or Sea.
Engineered to Perform.

End-to-end product development for marine and land applications. From initial concept through production-certified hardware, built for commercial buyers who demand precision from day one.

Live Ocean
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Combined Experience
200+
Years of Expertise
Combined engineering and industry experience across the GSM team, spanning marine, defense, and heavy industrial sectors.
Deliverables
150+
Projects Delivered
Vessels, deck systems, navigation packages, and custom marine equipment from concept to production.
Avg. Cert Cycle
14 wk
Brief to Certification
Median time from project brief to USCG or ISO certification, measured across the last 40 deliverables.
Compliance & Certification
46 CFR · Parts 25 & 185
United States Coast Guard federal commercial vessel standards. Compliance is designed in from day one, not verified after the fact.
9001:2015 · 8849 · 12217
Quality management system certified. Marine small craft safety and stability standards applied to every product category we engineer.
Directive 2013/53/EU
European conformity mark for recreational and commercial marine craft. Required for products entering EU-flagged or EU-market vessels.
What We Do

Four disciplines. One development partner.

01
Product Development
Concept definition through production-ready documentation. Engineering, compliance review, and spec-to-cert delivery.
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02
Engineering Consulting
Structural analysis, materials selection, failure mode assessment, and regulatory pathway mapping for complex marine systems.
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03
Prototyping & Testing
Rapid prototypes with environmental, load, and salt-spray testing to USCG and ISO test protocols before final production.
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04
Manufacturing Support
Supplier qualification, DFM review, BOM management, and production oversight through first-article inspection.
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Why Green Star Marine

The case for a focused development partner.

01

Regulatory compliance is built in, not bolted on.

Large OEMs treat certification as a post-design checkpoint. We treat it as a constraint from day one. Every design decision is made with USCG 46 CFR, ISO 9001, and CE pathways already mapped. That eliminates re-engineering cycles and compresses your time-to-market by weeks, not days.

02

Smaller team. Shorter feedback loop. Fewer delays.

A senior engineer at GSM works your project directly, not a PM who relays notes to a junior team. Design changes are turned in days, not weeks. Prototype revisions don't require a change-order committee. You talk to the person doing the work, which means fewer misinterpretations and tighter scope control.

03

Built for procurement teams, not consumers.

We don't sell through distributors or serve the recreational market. Every deliverable is formatted for commercial buyers: structured BOMs, test reports keyed to your acceptance criteria, regulatory documentation that drops directly into your vendor qualification file. No consumer-grade simplifications.

Recent Work

Selected projects.

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Caudwell project
Vessel
MV Kestrel: Aluminum Hull Refit
Full structural engineering package for 24m aluminum crew boat refit; USCG COI maintained throughout.
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Photon project
Equipment
DeckStar 400 Series Capstan
316L stainless capstan rated to 400kN; passed ISO 7825 and USCG salt-spray testing in 14 weeks.
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Caudwell project
Systems
NavLink ECDIS Integration Package
ECDIS integrated with radar and AIS across a 6-vessel commercial fleet; zero redundancy failures at 18-month audit.
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Start a Project

Ready to build something the ocean won't stop?

Tell us what you're building. We'll tell you what it takes: timeline, regulatory pathway, and a realistic scope. No obligation, no generic estimates.

Request Quote