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.

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

Emissions reduction system design (scrubbers, EEXI/CII compliance)
Alternative fuels integration (LNG, biofuels, methanol)
Energy efficiency retrofits (shaft power limitation, waste heat recovery)
Digital performance optimization solutions

New Build Design Engineering

For new vessels, we develop design solutions that incorporate the latest green technologies from the ground up. Our engineering teams work closely with shipyards and OEM partners to ensure new builds are future-ready, sustainable, and optimized for performance.

Comprehensive system integration design
Fuel system layout and emissions control integration
Energy management systems and digital monitoring
Compliance-driven design for IMO and local regulations

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

Sustainability

Waste Heat to Energy

3D scanning
Detailed engineering
Component delivery
Supervision

Performance

Offshore Retrofit

3D scanning
Detailed engineering
Component delivery
Supervision

Sustainability

Tanker Scrubber

3D scanning
Detailed engineering
Component delivery
Supervision

Newbuilding

RoRo Vessel

System design
Component delivery

Sustainability

Cargo Vessel

3D scanning
Detailed engineering

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

Green Technologies Videos

Goltens Green Technologies

Hyde Guardian HG250GC Ballast Water Treatment System Retrofit

Turnkey NKO3 Ballast Water Treatment Retrofit for Product Tanker

Optimarin Ballast System (1000 m3) retrofit on a Container Ship

Hyde Guardian Gold 300m3/hour BWT System aboard ROV Survey Vessel

Optimarin Ballast Water Treatment System Installation

3D Laser Scan and multi-system modeling for a Car Carrier undergoing BWT retrofit planning

3D Laser Scanning for BWT System

Optimarin Ballast System (2000 m3/hr) retrofit on a Bulk Carrier

Featured

Timelapse video of Optimarin Retrofit Installation

Case Studies

Turnkey ballast water treatment system retrofit in Asia

Optimarin OBS 1000m3/hr – container ship

Optimarin Japan contracted Goltens Singapore to perform a turnkey installation of Optimarin’s OBS onboard a 79,417 DWT Container vessel operating in Asia. The plan was to follow Goltens’ Green Technologies process to verify the system fit, model the layout, perform detailed engineering, prefabricate all piping and install and commission the…

Hyde Guardian HG200L ballast water treatment retrofit for container ship

3D Scanning, Design, Prefabrication And Installation Oversight

Seaboard Marine, a major container operator in Miami, contacted Goltens Green Technologies’ specialists in Miami to undertake and manage the end-to-end retrofit of a Hyde Guardian HG200L ballast water treatment system onboard the Seaboard Atlantic. The Seaboard Atlantic, built in 2009, is one of 30 vessels that Seaboard operates between…

Optimarin OBS Ballast Water Treatment System Installation

3D scanning, design, prefabrication and installation supervision for Optimarin ballast system for Technip

In November 2012, Goltens received the order for 3D Laser scanning and delivery of a detailed engineering design package and associated piping for the installation of an Optimarin ballast water treatment system (OBS) on the Apache II, an advanced pipelay vessel. The customer, Technip, a world leader in project management,…