Commercial Site Administrator

Commercial Site Administrator required!

Start date: 29/06/2026 (or earlier if possible)

End date: 06/12/2027

Location: Able Seaton, UK - Hornsea 3 Project

Onsite, Onsite 5x days a week - Monday to Friday

Rate: £20.00 (PAYE rate)

Overtime: N/A

Working hours: 40 hours per week, 8 hours per day

IR35 Status: Inside IR35

Client: Siemens Gamesa

Who is Siemens Gamesa? Siemens Gamesa is part of Siemens Energy, a global leader in energy technology with a rich legacy of innovation spanning over 150 years. Together, we are committed to making sustainable, reliable, and affordable energy a reality by pushing the boundaries of what is possible. As a leading player in the wind industry and manufacturer of wind turbines, we are passionate about driving the energy transition and providing innovative solutions that meet the growing energy demand of the global community. At Siemens Gamesa, we are constantly seeking talented individuals to join our team and support our focus on energy transformation. Our Commitment to Diversity

Job Description- Commercial Site Administrator Overview

We are excited to welcome a new colleague to join our Offshore Wind Farm project as a Commercial Site Administrator. In this role, you will play a key part in supporting the financial, commercial, and administrative activities of a large-scale offshore wind construction site. Working closely with the Site Management team and cross-functional partners, you will help ensure accurate commercial reporting, effective invoice and contract handling, and full compliance with Siemens Gamesa's standards for quality, transparency, and operational excellence. This role is on-site at the project location as part of an empowered, collaborative team that values ownership, proactive problem solving, and continuous improvement.

How You Will Make an Impact In this role, you will contribute directly to the successful execution of a major renewable energy project.

Your responsibilities include:

Commercial & Financial Administration

• Maintain accurate and up-to-date trackers for Purchase Orders (POs), commitments, forecasts, and actuals.
• Manage incoming invoices and support the end-to-end invoice lifecycle, ensuring compliance with internal processes and approvals.
• Maintain commercial documentation, PO status, cost tracking, and site level commercial records.
• Serve as the primary point of contact for subcontractor invoice inquiries and payment-status information. Site & Project Coordination
• Support the site and construction teams with commercial insights, documentation control, and financial updates.
• Collaborate with Procurement, Accounts Payable, and other operational teams to ensure aligned execution. What You Bring Siemens Gamesa seeks individuals ready to help shape the global energy transition. The ideal candidate demonstrates: Professional Skills
• Proven experience in commercial administration within a project or site-based environment.
• Strong proficiency in Microsoft Excel and SAP experience is highly advantageous.
• Ability to manage and analyse large volumes of commercial data with a high level of accuracy, organisation, and attention to detail. Behavioural Skills
• A proactive mindset with the ability to take ownership and drive results independently.
• Strong communication skills and the confidence to challenge, collaborate, and support a multi-disciplinary site team.
• A commitment to continuous improvement and willingness to support standardised processes and digital tools. Values & Culture Fit
• Passion for renewable energy and sustainability.
• Commitment to safety, inclusion, integrity, and teamwork - values widely emphasised across Siemens Gamesa.
• Willingness to work on-site at the Offshore Construction Project office as part of a
• dynamic, global environment.

We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention.

Adecco is an employment consultancy. We put expertise, energy, and passion into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an all-encompassing environment that helps them thrive.

Candidates will ideally show evidence of the above in their CV to be considered.

Please be advised if you haven't heard from us within 48 hours then unfortunately your application has not been successful on this occasion, we may however keep your details on file for any suitable future vacancies and contact you accordingly.

Pontoon is an employment consultancy and operates as an equal opportunity's employer.

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