About Soleco AS - Marine Structures Engineering

Soleco AS is run by Marc Lefranc and Eivind Sønju, providing engineering services and products within marine structures. We specialize in fixed and floating steel support structures, with experience dating back to the 1970s. Our global projects focus on Norway and Europe, delivering reliable solutions built on decades of steel expertise.

  • Reliability through proven engineering practices
  • Design for manufacture and assembly optimization
  • Lifecycle thinking for sustainable solutions

Marine Engineering Services - Offshore Structures

Concept & Feasibility

Early-stage engineering studies and feasibility assessments for marine structures, helping clients make informed decisions.

Structural Analysis

Comprehensive ULS, SLS, and fatigue analysis using advanced engineering software and proven methodologies.

Design for Manufacture & Assembly

Optimized designs that consider fabrication constraints and assembly sequences for cost-effective solutions.

Certification & Compliance

DNV and ISO certification support, ensuring compliance with international marine engineering standards.

Owner's Engineer / Technical Advisory

Independent technical oversight and advisory services throughout project development and execution phases.

Integrity Management & Life Extension

Asset integrity assessments and life extension strategies for existing marine structures.

Specialities

Fixed Steel Structures

Traditional fixed foundation solutions for offshore applications.

  • Steel jackets
  • Monopiles and transition pieces
  • Topside interfaces and connections
  • Foundation design and analysis

Floating Steel Structures

Advanced floating solutions for deep water applications.

  • Semi-submersibles and spars
  • Mooring and station keeping systems
  • Dynamic cable interfaces
  • Floating platform design

Experience

1970s–1990s
Steel jackets and North Sea heritage. Foundation of our expertise in offshore steel structures.
2000s
Offshore wind fixed foundations. Pioneering work in renewable energy marine structures.
2010s
Floating concepts and demonstrations. Advancing floating wind and marine technologies.
2020s
Scalable industrialisation and digital workflows. Modern engineering for the future.

Products

Our structural designs and software solutions for marine engineering applications, from floating wind platforms to military systems.

MOLO Floating Wind Platform - Next-generation floating offshore wind platform designed for mass production

MOLO® Floating Wind Platform

Next-generation floating offshore wind platform designed for mass production and cost-effective deployment in deep waters. Developed in collaboration with industry-leading fabricators.

Offshore Military Floating Sensor Array - Specialized floating platform systems for military applications

Offshore Military Floating Sensor Array

Specialized floating platform systems designed for military applications, providing stable sensor deployment and monitoring capabilities in challenging offshore environments.

Fast Manufacturing Jacket - Optimized jacket foundation designs for rapid manufacturing

Fast Manufacturing Jacket

Optimized jacket foundation designs engineered for rapid manufacturing and assembly, reducing production time while maintaining structural integrity and reliability.

Request product information

Team

Eivind Sønju - Managing Partner and expert in offshore structures

Eivind Sønju

Managing Partner

Expert in offshore structures with extensive experience in oil & gas and wind energy projects. Leads technical development and client relationships.

Marc Lefranc - Managing Partner and internationally recognized expert in marine steel fabrication

Marc Lefranc

Managing Partner

Internationally recognized expert with decades of experience in design and manufacturing of offshore structures. One of the world's leading specialists in marine steel fabrication and quality assurance, overseeing project delivery and technical standards.

Request full CVs

Frequently Asked Questions - Marine Engineering

What types of marine structures does Soleco AS design?

Soleco AS specializes in both fixed and floating steel support structures, including steel jackets, monopiles, semi-submersibles, and floating wind platforms. We serve the offshore wind, oil & gas, and military sectors.

What certifications does Soleco AS provide?

We provide DNV and ISO certification support, ensuring compliance with international marine engineering standards. Our team has extensive experience with regulatory requirements in Norway and Europe.

What is the MOLO® Floating Wind Platform?

MOLO® is our next-generation floating offshore wind platform designed for mass production and cost-effective deployment in deep waters. It's developed in collaboration with industry-leading fabricators.

What areas does Soleco AS serve?

We primarily serve Norway and Europe, with our global projects focusing on the North Sea region. Our expertise spans from traditional oil & gas structures to modern renewable energy platforms.

Contact Soleco AS - Marine Engineering Experts

Tell us about your marine structures project.

contact@soleco.no
+47 000 00 000
Norway; Europe