Offshore Substation Mechanical Engineer – Renewables & Diesel Gen

Semco Maritime; Gdynia; On-site; PLN 180,000 - 280,000; Full time

Job summary

Semco Maritime is seeking a Mechanical Engineer for the Renewables Division, based in Gdynia, Poland. You will own the mechanical package from concept to commissioning for offshore substation platforms and contribute to safe, reliable operations in demanding offshore environments.

You will work on EPC/EPCI contracts, focusing on emergency/backup diesel generators and fuel systems, while upholding safety culture and driving innovative solutions across large-scale offshore projects.

Qualifications

• Bachelor’s or Master’s in Mechanical Engineering or Marine Engineering.
• Experience with EPC/EPCI project execution in large-scale settings.
• Experience with diesel generator systems and offshore projects.
• Familiarity with DNV, IEC, and ISO standards.
• Strong written and spoken English; cross-functional teamwork.

Responsibilities

• Design, engineering & system integration of mechanical packages for offshore substations.
• Ensure compliance with HSE, quality, and regulatory standards across the project lifecycle.
• Prepare specifications, drawings, documentation, and procurement packages; sign FAT/SAT.
• Manage costs, hours, and quality for the mechanical scope within projects.
• Coordinate with clients, suppliers and internal teams; support tenders and engineering standards.

Skills

Mechanical Engineering

EPCI experience

Diesel generators

Offshore projects

English communication

Education

Bachelor’s or Master’s in Mechanical Engineering / Marine Engineering

Job description

Semco Maritime is seeking a Mechanical Engineer for the Renewables Division, based in Gdynia, Poland. You will own the mechanical package from concept to commissioning for offshore substation platforms and contribute to safe, reliable operations in demanding offshore environments.

You will work on EPC/EPCI contracts, focusing on emergency/backup diesel generators and fuel systems, while upholding safety culture and driving innovative solutions across large-scale offshore projects.