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At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

AECOM’s Enterprise Capabilities team is looking for a Junior Hydraulics & Drainage Engineer to join our team in Madrid.

About Enterprise Capabilities

Fundamental to our Think and Act Globally strategy and digital adoption, Enterprise Capabilities (EC) is AECOM’s primary vehicle for workshare. Operating across geographic boundaries and time-zones, EC partners with regional and Global Business Line project teams to provide technical expertise, accelerate delivery and keep AECOM competitive in the industry.

With a team of over 3000 technical professionals located across nine countries and remote technical anchors, EC teams are trusted to deliver high-quality, specialist services that help to fill capability gaps, resourcing needs and technical constraints on projects of all scopes and sizes.

Start here. Grow here.

We are currently looking to hire a Junior Engineer with some experience in Hydraulics and Drainage design, to join our supportive and highly skilled team. The team provides assessment, concept, feasibility, preliminary and detailed designs on a wide range of projects. Our clients work for private and public sector and include long term Framework Agreements with numerous Local Authorities together with Design and Build commissions for many major Contractors. Our group has an established track record of successfully delivering water designs for many years, throughout the US, Canada, Australia and New Zealand among others. You may have the opportunity to work on some of the most iconic Transportation and Water projects, being part of a diverse and multicultural team for Enterprise Capabilities.

In this role, you’ll support the design and development of Sustainable Urban Drainage Systems (SuDS) and hydraulic projects, working closely with senior team members and contributing to high‑quality engineering deliverables. Your main responsibilities will include:

• Apply and follow established CAD standards and procedures for SuDS projects, ensuring accuracy and consistency.
• Perform self-checks of your own deliverables and participate in quality reviews of documents prepared by peers.
• Assist in CAD drafting and design for SuDS elements across a variety of urban water projects.
• Conduct basic Hydraulics & Hydrology (H&H) calculations, including runoff estimations, flow routing, and detention basin sizing.
• Support the preparation of technical documentation, design reports, and presentations for project teams.

This role gives you hands-on exposure to real engineering work while being supported by an experienced team that values learning, quality, and innovation.

Why is this role great for early‑career engineers

• You’ll work closely with senior engineers who mentor, guide, and share knowledge.
• You’ll gain exposure to real projects with tangible environmental impact.
• You’ll develop your technical expertise in SuDS, CAD, and H&H tools—skills in high demand.
• You’ll be part of a supportive, quality‑driven team where your ideas are valued.

You’re a junior professional passionate about water engineering, sustainability, and technical growth. We’d love to hear from you if you bring:

• 1–2 years of experience in hydraulics, hydrology, or drainage design, with a strong interest in SuDS and a desire to build a technical career in this field.
• Proficiency in AutoCAD or Civil3D, including setup of standards, pipeline alignments, profiles, cross sections, grading, and surface operations.
• Experience with H&H software (e.g., HEC-RAS/HMS, StormCAD, Infoworks ICM) is highly valued.
• Familiarity with SuDS design elements, such as permeable pavements, swales, detention basins, or green roofs (a plus, not mandatory).
• Fluency in English, both written and spoken.

Preferred Qualifications

• A Bachelor’s or Master’s degree in Civil, Environmental, Water Engineering, or a related discipline.

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2024. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.