As a DCEO: Engineering Operations Technician – Water Engineer at AWS, you will be responsible of ensuring the seamless operation and optimization of water treatment systems and chemical processes across our data center fleet. This role combines expertise in water chemistry, treatment systems, and infrastructure management to ensure the reliable operation of AWS data centers.

We are looking for a Water Utilities Engineer to join the Operations Team within our Utilities Team at the ZAZ cluster. The EOT is a hands-on water equipment troubleshooting and operation responder, with a focus on RO equipment, disinfection systems, evaporative cooling and associated critical infrastructure. Your work will help maintain one of the world's largest information system infrastructures.

Key job responsibilities
Technical Leadership:
- Serve as subject matter expert (SME) for water system infrastructure and chemical treatments
- Oversee critical systems including ultrafiltration, reverse osmosis, and oxidant systems
- Develop and maintain Legionella prevention programs
- Implement Water Utilization Efficiency (WUE) improvements
Design & Engineering:
- Review and influence water chemistry and treatment designs for new facilities
- Coordinate with design engineering teams on system specifications




- Review construction documents and provide technical guidance
Operational Management:
- Manage preventative maintenance programs
- Create and implement standard operating procedures
- Monitor system performance and establish benchmarks
- Coordinate with operations managers and field engineering teams
- Review of procedures (SOPs/MOPs/EOPs), support compliance with general policies, and maintain accurate records of equipment status, incidents, and maintenance activities.

About the team
We are the Engineering Operations Water Utilities Team, an Infrastructure Operations team dedicated to the water treatment and distribution systems of the AWS data center campus. Our mission is to ensure that the water utility systems supporting the cluster — including cooling circuits, process water, chemical treatment, and hydraulic infrastructure — operate reliably, safely, and efficiently. We work in close coordination with construction, commissioning, design, mechanical teams, and external water utility providers. You'll join a team of skilled technicians and engineers committed to continuous improvement, safety excellence, quality compliance, and operational resilience. Together, we're building and maintaining the critical infrastructure that keeps innovation running for customers globally.

📌 Engineering Operations Technician – Water Engineer, Data Center Engineering Operations (Zaragoza)
🏢 Amazon Data Services Spain, S.L.U.
📍 Zaragoza