Offshore Site Manager

Aventa Group; Schleswig-Holstein; Remote; EUR 90,000 - 120,000; Full time

Job summary

Aventa is seeking an Offshore Site Manager to supervise interim maintenance activities aboard a CSOV serving a German North Sea offshore wind farm.

You will act as the client’s on-site representative, coordinating safety, welfare and execution with a 24-hour coverage model alongside another representative.

Qualifications

• Must-have: relevant offshore construction, operations or maintenance experience.
• Must-have: proven ability to manage, motivate and coordinate people in an international project environment.
• Nice-to-have: experience supervising interim maintenance or completion works on offshore wind turbines; CSOV/CTV operations experience.

Responsibilities

• Supervise offshore site team welfare during 14 days on/14 days off rotation.
• Plan, coordinate and deploy interim maintenance teams according to construction priorities.
• Lead HSE leadership, toolbox talks and pre-job briefings to align scope, hazards and priorities.
• Coordinate with onshore base harbour organisation for spares, tools, materials and logistics.
• Monitor and report progress of maintenance campaigns including inspections and defect rectification.

Skills

Offshore supervision

People management

HSE leadership

Reporting & coordination

Education

Engineering background or equivalent experience

Job description

Location: German North Sea (offshore, onboard a Construction Service Operation Vessel - CSOV)

Contract type: Contract

Start date: From January 2027, tentative (second seat from January 2028)

Duration: Throughout the interim maintenance campaign on the assigned vessel

Rotation: Back-to-back rotation, 14 days on / 14 days off, 12 hours per day (with flexibility to support operational needs)

Travel: Mobilisation and crew changes organised via the project's base port

Right to work / visa: Eligible to work in the EU without a visa required

Equipment: Laptop, mobile phone and vessel-specific email account provided for the duration; certified site-specific PPE provided

Project reference: Offshore wind farm - interim maintenance, German North Sea

Project scope

The assignment covers the client-side supervision of interim maintenance activities on an offshore wind farm cluster, delivered from a CSOV. One Offshore Site Manager is required onboard at all times, sharing 24-hour coverage with an Offshore Client Representative (12 hours each). The role is the primary client representative for planning, supervising and executing interim maintenance work, and is central to keeping teams safe, coordinated and effective offshore.

Role overview

Act as the client's professional and proactive representative offshore, taking day-to-day responsibility for the supervision, coordination and welfare of the offshore site team delivering interim maintenance works, and providing visible HSE leadership throughout.

Key responsibilities

Supervision and team welfare

• Supervise, coordinate and take responsibility for the welfare of the offshore site team during the rotation
• Plan, coordinate and execute deployment of interim maintenance teams in line with construction priorities
• Ensure all personnel are protected through effective planning, supervision and adherence to approved procedures

HSE leadership and quality

• Provide visible HSE leadership, lead by example, and conduct regular offshore walkdowns
• Intervene or escape when good practice, quality standards or safety requirements are not met
• Lead toolbox talks, pre-job briefings and shift handovers to align the team on scope, hazards and priorities

Coordination and reporting

• Participate in marine operations and project meetings to align execution, access, logistics and SIMOPS
• Monitor and report progress of maintenance campaigns, including inspections, snagging and defect rectification
• Coordinate with the onshore base harbour organisation for spares, tools, materials and logistics

Requirements

Education

• Technical or engineering background, or equivalent professional experience

Experience

Must-have:

• Relevant offshore construction, operations or maintenance experience
• Proven ability to manage, motivate and coordinate people in an international project environment

Nice-to-have:

• Experience supervising interim maintenance or completion works on offshore wind turbines
• Experience working from CSOVs and CTVs

Certifications

• Valid offshore medical certificate
• HUET and CA-EBS may be required
• Health and safety competency (e.g. IOSH, NEBOSH) and a valid safety passport

Technical skills

• Supervision of offshore maintenance, inspection and snagging/defect works
• Toolbox talks, pre-job briefings and shift handover facilitation
• Strong team welfare focus in a remote offshore setting
• Comfortable with 14-day offshore rotations and 12-hour shifts