DUNCAN SHOEMAKER & ASSOCIATES LLC

What DUNCAN SHOEMAKER & ASSOCIATES LLC does

Duncan Shoemaker & Associates LLC, operating under the brand Lone Star Maritime, is a privately held independent marine surveying and engineering services firm headquartered in Liberty Hill, Texas. The company delivers objective, third-party technical services to four core client categories — insurers, operators, EPC contractors, and asset owners — across complex offshore, marine, and heavy transport operations. Work is executed through a combination of project-specific and long-term assignments that integrate direct field attendance with engineering review, with the firm positioning its independence as a core selling point.

The service portfolio comprises eight interconnected offerings: Marine Warranty & Assurance (independent third-party warranty surveying for insured marine operations), Marine & Offshore Surveying (vessel, barge, and asset condition, suitability, and compliance assessment), Engineering & Analysis (independent review, analysis, and verification supporting compliant execution), Cargo & Logistics (surveying for heavy, abnormal, and project cargo across marine, road, rail, and multimodal transport), Claims & Expert Services (technical support for insurance claims, disputes, and failure investigations), Port Captain Services, P&I Surveys & Investigations, and Hull & Machinery Surveys. Services are delivered via an enterprise field-sales motion that emphasizes direct client engagement, with early involvement encouraged where risk identification, constructability, and execution planning are critical.

Revenue is generated through professional services fees on a project-specific, quote-based pricing structure; pricing is not publicly disclosed. The firm operates from approximately 15 locations globally, with direct-hire staff in Texas (Houston, Corpus Christi) and California (San Diego, Long Beach) supplemented by trusted partner coverage across additional US coastal markets and international locations in Mexico, Tampico, the Netherlands (Amsterdam), and China (Shanghai). Total headcount is approximately 15, with no public revenue, funding, ownership, or financial disclosures available.

Name

DUNCAN SHOEMAKER & ASSOCIATES LLC

Legal name

Lonestar Maritime

Website

https://duncanshoemaker.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Duncan Shoemaker & Associates LLC (Lone Star Maritime) is an independent marine surveying and engineering services firm delivering third-party warranty surveying, vessel assessment, engineering review, and claims support to insurers, operators, EPC contractors, and asset owners across marine, offshore, and heavy transport operations globally.

Ownership category

akta.pro rank

Product category

Marine Surveying & Warranty Services

NAICS

Support Activities for Water Transportation (4883), Other Support Activities for Water Transportation (48839)

SIC

Ship & Boat Building & Repairing (3730), Oil & Gas Field Services, Nec (1389)

akta.pro industry

PRIMARYTLAHAJAI

Marine Service Provider Coordination (Diving, Inspection, Class/Survey Support)

Transportation & Logistics/Ports, Terminals & Maritime Services/Ship Agency, Husbandry & Port Call Services

SECONDARYTLAKAKAJ

Underwater Hull Inspection, Cleaning & Propeller Services

Transportation & Logistics/Vehicle & Equipment Maintenance, Repair & Services (MRO)/Marine Vessel Maintenance & Repair (Shipyards)

SECONDARYEUALABAJ

Offshore Marine & Aviation Support (PSVs, AHTS, Crew Boats, Helicopters)

Energy, Utilities & Environment/Oil & Gas (Upstream, Midstream, Downstream and Refining)/Oilfield Services & Drilling (OFS)

Keywords

• Marine surveying services
• Marine warranty surveying
• Offshore engineering services
• Hull and machinery surveys
• Cargo and logistics surveying

Headquarters

HQ city

Liberty Hill

HQ country

United States

HQ region

North America

Offices15 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Professional Services Revenue: Professional services revenue generated through marine surveying, marine warranty, and engineering services delivered to clients on a project-specific and long-term contractual basis.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Lone Star Maritime (DBA of Duncan Shoemaker & Associates LLC) provides independent marine surveying, marine warranty, and engineering services supporting offshore, marine, and heavy transport operations worldwide. Services combine direct field attendance with engineering review and are delivered to insurers, operators, EPC contractors, and asset owners requiring objective assessment and risk management. Engagements are accepted on both project-specific and long-term bases.

Product overview

Lone Star Maritime is a marine surveying and warranty services company that offers a unified portfolio of eight interconnected service offerings. The core services include Marine Warranty & Assurance (third-party warranty surveying for insured marine operations), Marine & Offshore Surveying (vessel and asset condition assessment), Engineering & Analysis (independent technical review and verification), and Cargo & Logistics (surveying for heavy and project cargo). Supporting services include Claims & Expert Services (technical support for disputes and investigations), Port Captain Services, P&I Surveys & Investigations, and Hull & Machinery Surveys. These services are delivered together to support insurers, operators, EPC contractors, and asset owners requiring objective assessment and risk management across complex marine operations.

Differentiator

Problem solved

Functional benefit

Products and services

• Marine Warranty & Assurance

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Expansion highlights3 records

Broad incumbents

• Lloyd's Register: Global classification society providing hull & machinery surveys, marine warranty, and offshore advisory directly comparable to DSA's service lines; competes for the same insurer and operator mandates.
• DNV Maritime: One of the world's largest classification societies and offshore assurance providers, offering marine warranty, offshore verification, and survey services that overlap directly with DSA's portfolio. A primary competitor for independent warranty mandates.
• American Bureau of Shipping (ABS): US-headquartered classification society with strong Gulf of Mexico and offshore presence; offers hull & machinery surveys, marine warranty and offshore verification services that overlap with DSA's offerings, particularly in the US market.
• Intertek Group: Global TIC company with marine surveying, cargo inspection, and offshore assurance offerings directly comparable to DSA's cargo & logistics and marine & offshore surveying services.
• Bureau Veritas Marine & Offshore: Global TIC giant with a Marine & Offshore division offering classification, marine warranty surveying, and offshore certification. Directly comparable services to DSA but vastly larger scale; a key incumbent DSA competes with on warranty tenders.
• SGS Industrial Services: Global inspection, verification, and testing giant with marine surveying, cargo inspection, and offshore services; comparable to DSA on cargo & logistics surveying and offshore inspection work, though much broader in scope.

Direct peers

• Maranatha Marine (and similar independent warranty surveyors): Independent marine warranty surveying firm offering project-specific warranty attendance and engineering review; similar business model and customer mix (insurers, operators, EPC contractors) as DSA.
• Jensen Maritime Consultants: Independent US marine engineering and surveying firm providing vessel surveys, naval architecture, and offshore engineering support — a closely comparable specialist peer to DSA in size and service scope.
• OceanTech (marine surveying independents): Independent marine surveying and consulting firm providing hull & machinery, P&I, and cargo surveys; closely comparable niche specialist peer competing for similar independent warranty and survey mandates.
• RINA Services: Italian classification society with marine surveying, warranty survey, and offshore engineering services comparable to DSA; a direct specialist competitor in marine warranty and certification.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/duncan-shoemaker-&-associates-llc

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about DUNCAN SHOEMAKER & ASSOCIATES LLC