Commercial Manager
RES
Company Overview
Renewable Energy Systems (RES)
Hertfordshire, United Kingdom
1981
Approximately 2,500 employees globally (source: linkedin.com). No publicly disclosed revenue figures for 2023.
What They Do
RES focuses on a diverse range of renewable energy technologies, including wind (both onshore and offshore), solar photovoltaic (PV), battery energy storage systems (BESS), and green hydrogen solutions. The company provides comprehensive services that span the entire lifecycle of renewable energy projects, from initial development and engineering to construction, operations and maintenance (O&M), asset management, and financing. Their expertise allows them to deliver utility-scale projects that meet the growing demand for sustainable energy solutions across various markets, including utilities, corporates, and governments (source: res-group.com).
Projects & Track Record
RES has an impressive portfolio of completed projects, including the 278MW King Mountain Wind Farm in Texas, which was completed in 2001 and was the world's largest at the time. Other notable projects include the 90MW Inner Dowsing offshore wind farm in the UK and the 270MW Lincs offshore wind farm, both of which have contributed to RES's reputation as a leader in the renewable energy sector. The company has also developed significant solar projects, such as the 30MW Webberville solar park in Texas, showcasing its versatility in renewable energy solutions (source: res-group.com).
Recent Developments
In recent years, RES has made significant strides in expanding its project portfolio and capabilities. In 2024, the company secured a Generation License for the 70MW Elmacık Wind Power Plant in Turkey and advanced the development approval for the Tarong West Wind Farm in Queensland, Australia, which is set to provide power for approximately 230,000 homes. Additionally, RES has partnered with Octopus Energy on a £3 billion investment in green hydrogen in the UK, further solidifying its commitment to innovative renewable energy solutions (source: keyfactsenergy.com).
Working There
RES offers a variety of roles across multiple departments, including development, engineering, construction, operations and maintenance, asset management, finance, and legal services. The company emphasizes a collaborative culture, with a commitment to diversity and inclusion, and provides a stimulating work environment for its employees. The global headquarters in Kings Langley, UK, features modern facilities designed to support employee well-being, such as bike racks and showers, promoting a healthy work-life balance (source: res-group.com).
Last updated on 2026-02-23 | Report an issue
Do you want to work to make Power for Good?
We're the world's largest independent renewable energy company, guided by a simple yet powerful vision to create a future where everyone has access to affordable, zero carbon energy.
We know that achieving our ambitions would be impossible without our people. Because we're tackling some of the world's toughest problems, we need the very best people to help us. They're our most important asset so that's why we continually invest in them.
RES is a family with a diverse workforce, and we are dedicated to the personal and professional growth of our people, no matter what stage of their careers they're at. We can promise you to reward work which makes a real impact, the chance to learn from inspiring colleagues from across a growing, global network and opportunities to grow personally and professionally.
Our competitive package offers a wide range of benefits and rewards.
The position
The Commercial Manager leads all commercial activities for the Boulder Creek Wind Farm, including civil works, electrical works, WTG transport and installation, substations, and commissioning.
Reporting to the Project Director and working closely with cross-functional teams and contractors, this role supports strong commercial governance, contract compliance, cost and claims management, forecasting, and stakeholder alignment throughout construction and commissioning.
This position plays a key role in delivering a safe, timely, and cost-effective renewable energy project while upholding RES' commitment to safety, sustainability, inclusion, and transparent commercial practice.
Key Responsibilities
- Lead commercial administration, ensuring contract compliance and timely management of claims, variations, and notices.
- Produce accurate contractual documentation and instructions.
- Manage workload independently and guide a small team to deliver strong commercial outcomes.
- Apply sound judgement and negotiation to support risk decisions and stakeholder alignment.
- Maintain governance across cost control, forecasting, risk, valuations, and reporting.
- Monitor performance and recommend corrective actions.
- Support resolution of design, constructability, and compliance issues.
- Build effective stakeholder relationships.
- Promote a safe, inclusive, values-driven culture.
Qualifications
- Bachelor's degree in engineering (any discipline), Construction Management, Quantity Surveying, Commercial/Contracts Management, Business or related field.
- Strong understanding of commercial and contractual principles within large infrastructure or energy projects.
- Experience administering construction contracts (EPC/BOP/WTG/ TSI or similar).
- Strong communication, negotiation and stakeholder engagement skills.
- Ability to independently manage complex commercial interfaces, risks and competing priorities.
- Competence in Microsoft Excel, Word and project/financial reporting systems.
- Full Australian Driver's Licence.
Skills
- Experience with civil and electrical Balance of Plant scopes (access roads, hardstands, foundations, cabling, substations, etc.) and Wind Turbine Generator.
- Experience in the renewable energy sector (wind, solar or BESS).
- Familiarity with Australian construction legislation, safety regulations and environmental compliance.
- Experience working within a client side or owner's engineer environment.
Experience
- Proven experience in commercial management or contract administration on major infrastructure projects.
- Demonstrated capability in cost forecasting, valuations, claims assessment and change management.
- Experience preparing detailed commercial reports for senior leaders.
- A background working in dynamic site-based environments and multidisciplinary project teams.
Culture of Care for our People, Our Planet, and Our Product
In joining RES, you chose to become part of an organisation built on a long history of operational excellence and care. We have always cared about our employee's safety, wellbeing, and personal growth. We truly value and respect the individual contributions of our people and believe that diversity provides an important range of perspectives. A fair and inclusive culture makes us stronger. Our culture of care and inclusion extends to the environment and to external communities, stakeholders, clients, suppliers, and the carbon footprint we leave.
Qualified applicants will receive consideration for employment without regard to race, colour, relation, sex, sexual orientation, gender perception or identity, national origin, age, marital status, or disability status. RES is a LGBTQ+ Inclusive Employer and Certified as a Family Friendly Workplace.
RES acknowledges Aboriginal and Torres Strait Islander peoples as the Traditional Owners and Custodians of Country throughout Australia and their ongoing connections to land, sea and community. We pay our respect to Elders past and present and to all Aboriginal and Torres Strait Islander peoples.
Please let us know if you have any special requirements or need any assistance during the interview.
Recruiting Process
This role will be advertised internally for one week to internal applicants. If no suitable candidates are sourced, the role will then be advertised externally for four weeks. We will contact the candidates after the four-week period.
Please note unsolicited CVs from agencies will not be accepted.
Note: This role does not provide sponsorship; we welcome applications from candidates who have full work rights.
At RES, we celebrate differences as we know it makes our company a great place to work. Encouraging applicants with different backgrounds, ideas and points of view, we create teams who work together to solve complex problems and design practical solutions for our clients. Our multiple perspectives come from many sources including the diverse ethnicity, culture, gender, nationality, age, sex, sexual orientation, gender identity and expression, disability, marital status, parental status, education, social background and life experience of our people.
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About the role
February 26, 2026
Full Time
Company
- Sydney, Australia
- Melbourne, Australia
Proven experience in commercial management or contract administration on major infrastructure projects.
UTC+10:00 — UTC+11:00
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