Design Engineering & Class Approval

Sustainable Engineering Excellence

Engineering Solutions for Retrofit and New Build Vessels

At Goltens Green Technologies, we specialize in delivering innovative design engineering solutions tailored to the needs of both retrofit and new build marine projects. With hundreds of complex projects delivered over the past two decades supporting shipowners and operators worldwide, our team of skilled engineers and project managers provides end-to-end solutions that maximize efficiency, reduce environmental impact, and ensure compliance with the latest maritime regulations.

Design Engineering
  • Deploy multidisciplinary engineers leveraging a broad range of specialist software to create clash-free 3D, FEA and CFD models
  • Develop system designs and detailed component designs
  • Generate engineering packages including class approval documents, detailed drawings and BoM

Retrofit and New Build Design Engineering

From cutting-edge emissions reduction systems to advanced energy efficiency solutions, our design engineering capabilities cover the full range of retrofit and new build applications. Partner with Goltens Green Technologies to ensure your next retrofit or new build project meets the highest standards of efficiency, sustainability, and performance.

Retrofit Solutions

Our retrofit engineering services help you meet evolving environmental standards and performance targets. Whether upgrading existing systems or integrating new technologies, Goltens Green Technologies ensures seamless adaptation to your operational requirements.

  • Emission reduction systems (Scrubbers, SCR’s and carbon capture)
  • Alternative fuels integration (LNG, biofuels, methanol)
  • Energy efficiency retrofits (Shaft generator, coolingwater optimization, wast heat recovery)
  • System retrofits (Sewage treatment units, purifier replacements, boiler retrofits)
  • Offshore retrofits (Helicopter refueling skids, LARS systems)
  • Construction retrofits (walkway modifications, sliding platforms, tank modifications)
  • Dredging retrofits (Jetwater piping replacements, ROV tower modifications, Glandwater system modifications)

New Build Design Engineering

For new-build vessels, we provide comprehensive system engineering solutions for engine rooms and technical spaces. Our expertise spans both commercial ships and large superyachts, delivering designs that integrate the latest sustainable and energy-efficient technologies.

Working closely with shipyards, classification societies, and OEM partners, we ensure every new-build project is future-ready, environmentally responsible, and optimized for operational performance and reliability.

Our engineering services include both basic and detailed design, covering:

  • System P&IDs
  • Comprehensive 3D modelling of systems and supporting structures
  • Coordination and management of class approval processes
  • Prefabrication drawings to support efficient and accurate installation
  • Detailed installation drawings for onboard construction and outfitting

This integrated approach ensures seamless project execution from concept through construction.

Integrated Project Management Oversight

Our holistic approach to design engineering includes comprehensive project management oversight and interaction with Class and Shipyards to ensure the smoothest execution.

From concept design through installation and commissioning, we ensure your project is delivered on time and on budget. Our project managers coordinate every aspect, including:

  • Detailed engineering documentation and Class liaison
  • Procurement and vendor coordination
  • Installation supervision and commissioning
  • Regulatory compliance validation
  • Stakeholder (Owner, Class, Shipyard) communication and reporting

Our Work

Ship Systems

  • BWTS Re-Retrofits
  • Cooling water system modifications
  • Purifier replacement
  • Bilge system upgrade

Offshore Retrofit

  • 3D scanning
  • Detailed engineering
  • Component delivery
  • Supervision

Newbuilding

  • System design
  • Component delivery
  • Commissioning

Construction

Construction examples:

  • Expansion tank upgrade
  • Walkway replacement
  • New deck house tanker

Why Choose Goltens?

  • Global Expertise with local Contact: Engineering teams in key maritime hubs across the globe. Engineers with 25+ years of experience in newbuild and retrofit system engineering.
  • Sustainable Solutions: Environmentally responsible, future-ready designs.
  • Proven Track Record: Over 1,000 projects successfully executed making us one of the most trusted brands supporting the maritime industry.
  • End-to-End Support: From initial consultation to operational handover, we’re with you every step of the way.

Let’s Design a Greener Future Together

Contact us today to discuss your engineering needs and learn how we can support your next project.

Green Technologies Videos

Featured

Timelapse video of Optimarin Retrofit Installation

Case Studies