Job Description
Benefits
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, solid 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
This role provides the opportunity to: 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 You will work closely with engineering, commercial, procurement and leadership teams, providing accurate and competitive cost estimates that shape major bid outcomes and support project execution.
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
Required Skills and Competencies
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.
ACCIONA has been given the Top Employer ****, ****, **** & **** 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 ****, 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.
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📌 Senior Estimator - Water Infrastructure (Melbourne)
🏢 Acciona
📍 Melbourne