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 41,500 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.
Work on major, career‑defining water infrastructure tenders
Opportunity to transition from bid phase into project delivery
Competitive remuneration with strong development pathways
Join a sustainability‑driven global business expanding across Australia
About the Project ACCIONA Agua is progressing several major water infrastructure tenders across Australia, including large‑scale desalination and drinking‑water treatment facilities, complex electromechanical systems, and long‑term water‑security projects. These works form part of ACCIONA's growing national pipeline and represent key opportunities to shape future water infrastructure delivery.
As part of this growth, we are seeking a Senior Estimator with demonstrated multidisciplinary experience, strong technical capability, and deep knowledge across mechanical and electrical disciplines to support high‑quality cost estimating from the tender stage through to project delivery. This position can be based in Brisbane, Sydney or Melbourne.
About the Opportunity
Join a
high‑profile, large‑scale water tender
and major upcoming projects
Transition from the tender phase into delivery, maintaining continuity and ownership
Work on
complex, multidisciplinary electromechanical systems
Be part of
ACCIONA's long‑term expansion of water projects
across Australia
What are the key accountabilities for the position?
Develop accurate, competitive cost estimates for large‑scale desalination and water treatment projects
Lead detailed quantity take‑offs and robust cost forecasting
Manage multiple bids simultaneously, acting as the key interface with senior leadership
Coordinate estimates across mechanical, electrical, civil and subcontracted scopes
Review and refine estimates based on project requirements and client feedback
Participate in pre‑ and post‑bid meetings, ensuring full compliance with client and regulatory standards
Collaboration & Delivery Readiness
Partner with internal teams and key subcontractors to obtain pricing for labour, materials and specialist equipment
Maintain and enhance historical cost databases and utilise internal estimating systems
Ensure seamless knowledge transfer to delivery teams once projects are awarded
Leadership & Development
Mentor and support junior estimators, encouraging technical excellence and consistency
Contribute to the development of estimating standards and best practices across the business
Planning & Quality Control
Develop and maintain company‑wide estimating methodologies and governance
Ensure estimating tools align with industry best practice
Collaborate closely with Quality Management to maintain strong compliance and control standards
Skills & Experience Required
Bachelor's degree in Mechanical or Electrical Engineering, or related discipline
Minimum 7+ years' experience estimating
on major water infrastructure projects
Demonstrated multidisciplinary experience with strong technical capability and deep knowledge across mechanical and electrical disciplines
Proven ability to produce accurate cost estimates for treatment plants, desalination facilities, pipelines or pump stations
What we offer Engineers at ACCIONA work on complex, meaningful infrastructure. You will join teams that solve technical problems and deliver projects with lasting community value. You will access development programs, supportive leaders and a culture built on safety, collaboration and innovation.
If you feel you have the skills and experience for this role, apply today. We encourage you to apply even if you do not meet every requirement and value transferable skills. We welcome applicants from all backgrounds. We are an Equal Opportunity Employer and encourage people with disability, Aboriginal and Torres Strait Islander peoples and candidates from diverse communities to apply.
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