Commissioning Expert OSS Onshore/Offshore

Tis Gmbh; Berlin; Hybrid; EUR 83,000 - 124,000; Full time

Job summary

Tis Gmbh is seeking a Commissioning Expert to lead the commissioning and integration of mechanical and auxiliary systems for offshore and onshore substations across Europe. The role covers supervision of FAT/SAT testing, snag management, and collaboration with construction and QA/QC teams.

The ideal candidate has 5+ years in commissioning for substations or industrial platforms, knowledge of DIN VDE/IEC standards, and a valid GWO certificate. English fluency is required; German is a plus.

Qualifications

• 5+ years of experience in commissioning and integration of auxiliary/mechanical systems on substations or industrial platforms.
• Knowledge of DIN VDE and IEC standards and certification requirements.
• Experience with QA/QC processes during fabrication and commissioning phases.
• Valid GWO certification for offshore work.
• Fluent English required; German is a plus.

Responsibilities

• Plan, execute, and supervise commissioning of mechanical and auxiliary systems, including HVAC, LV switchboards, FiFi systems, cranes, communication, and safety systems.
• Ensure compliance with technical specs, certification, and HSE standards.
• Conduct FAT/SAT, signal testing, and inspections.
• Identify deviations and maintain snag/punch lists and documentation.
• Support partial and final system acceptance in factory, yard, and offshore locations.
• Collaborate with construction, QA/QC, and engineering teams for smooth integration.

Skills

Commissioning

Mechanical systems

HVAC

FAT/SAT testing

DIN VDE/IEC standards

GWO certification

English fluent

Job description

We´re Hiring: Commissioning Expert - Mechanical & Auxiliary Systems (Offshore / Onshore Substations)

Are you a seasoned commissioning professional with a strong background in mechanical and auxiliary systems?

We are looking for a Commissioning Expert to support the delivery, integration, and testing of auxiliary mechanical systems on offshore and onshore substations — as part of large-scale renewable energy infrastructure across Europe.

This is a long-term assignment (until end of 2027) on major offshore wind projects.

Locations: The Netherlands (Vlissingen, Schiedam, Stormpolder), Offshore Baltic Sea, Berlin

Type: Freelance or employment

Level: Professional / Expert

Your Mission:

• Plan, execute, and supervise commissioning of mechanical & auxiliary systems, including HVAC, LV switchboards, firefighting (FiFi) systems, cranes, communication, and safety systems
• Ensure full compliance with technical specifications, certification, and HSE standards
• Conduct FAT/SAT (Factory and Site Acceptance Testing), signal testing, and inspections
• Identify and report deviations and maintain up-to-date snag lists, punch lists, and documentation
• Support partial and final system acceptance in factory, yard, and offshore locations
• Collaborate with construction, QA/QC, and engineering teams for smooth integration

Your Profile:

• 5+ years of experience in commissioning and integration of auxiliary/mechanical systems on substations or industrial platforms
• In-depth knowledge of DIN VDE, IEC standards, and relevant certification requirements
• Experience with QA/QC processes during fabrication and commissioning phases
• Valid GWO (Global Wind Organisation) certification for offshore work
• Fluent English required; German is a plus