Senior O&M Manager Senior O&M Manager

ACCIONA is a global company, leading in the development of regenerative infrastructure that creates a positive impact on society. Our workforce consists of more than 65,000 professionals, present in more than 40 countries across the five continents, all contributing in our mission to design a better planet. Are you a passionate individual who wants to make a difference, promote sustainable development, and find solutions to the biggest global challenges including climate change, overpopulation, and water scarcity?

Come and join us in building the infrastructure our planet needs to achieve a sustainable future.

At ACCIONA, we are at the forefront of developing, delivering, and operating sustainable assets, leading global initiatives to build a better future.
We are seeking an experienced Senior O&M Manager to support the Operation and Maintenance (O&M) of large-scale water treatment projects, focusing on both conventional water treatment, wastewater, and desalination plants. This is a vital role that combines engineering expertise with innovative solutions to enhance project delivery and client satisfaction.

• Incorporate client objectives into our tender and way of working.
• Develop and present material for client interactive workshops.
• Gather valuable information from clients to deliver strategic solutions.
• Collaboration and advisory to the engineering team on the selection of treatment processes and technologies to optimize TOTEX.
• Identify, evaluate, and determine how to manage risks and opportunities.
• Develop and evaluate value engineering proposals.
• Develop and present O&M cost estimates.
• Coordinate and file project O&M documentation, including tender and contract documents, correspondence, and safety, quality, and environmental documentation.
• Prepare, review, and provide written deliverables as required within the tendering process.

• Ensure process, mechanical, and electrical equipment selection, construction, and installation meet O&M project specifications and requirements.
• Support management with scoping, specification, and tendering during the procurement phase.
• Contribute to the development of Management Plans, Functional Descriptions, Commissioning, ITPs, Performance tests, and O&M documentation.
• Recruiting the Key roles in the O&M team & ensuring alliance culture is built from the early stages and maintained throughout the O&M.

• Ensure the health, safety, and well‑being of all personnel at all times.
• Ensure protection of the environment at all times.
• Develop and compile project reports, communicate with clients and partners, and coordinate regular status meetings.
• Prepare, present O&M cost estimates & yearly budgets.
• Prepare, develop, and update asset maintenance plans to maximize plant availability and asset life.
• Analyze the usage of DE tools for optimisation of O&M costs and ensure robust operations.
• Contribute to the project's positive impact.
• Provide all necessary tools to meet water quality specifications and manage any water quality‑related incidents.
• Comply, so far as is reasonable, with all reasonable instructions, either personally or to the business, given so as to comply with project contractual requirements, Acts and/or Regulations.
• Give due consideration to the sustainability impact of all acts and/or omissions, either by oneself or by others.

• Degree in Civil, Chemical, Mechanical, Electrical, or related Engineering field.
• Strong communication skills in both verbal and written English (including technical report writing).
• Ability to prioritise and work autonomously on tasks.
• Ability to work within a team as well as independently.
• Willingness and flexibility to travel both interstate and overseas.
• Spanish language skills preferred.

• O&M experience in a design team or a tendering team.
• O&M experience for a minimum of 5 years at the senior manager level of conventional and/or desalination water treatment processes.

This is an exciting opportunity to work on large‑scale, impactful projects that drive sustainability and innovation in the water treatment sector. Join a team committed to excellence and a company dedicated to creating lasting, positive change.

ACCIONA has been given the Top Employer 2022, 2023, 2024 & 2025 certification in Australia, which certifies the company's commitment to excellence in human resources management and those who focus on putting their people first through their exceptional HR policies. Since establishing a presence in Australia in 2002, ACCIONA has made significant investments in local opportunities and project development. ACCIONA employs more than 3,000 people in its renewable energy, infrastructure and water projects across Australia & New Zealand.

We are an Equal Opportunity Employer and promote equality and diversity. Indigenous Australians and candidates from minority groups are encouraged to apply.