Job Description

Job Title: Project Engineer – Water Treatment (f/m/d)

Locations: Madrid or Barcelona, Spain

Job Schedule: Full Time

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets.

We are more than 36,000 people, in over 70 countries, dedicated to improving quality of life. Everyone has an important role to play. With the power of many curious minds, together we can solve the world’s most complex challenges and deliver more impact together.

Arcadis is seeking a Project Engineer – Water Treatment (f/m/d) join our Water Treatment Team in Spain (Madrid or Barcelona).

While the role will be based in either Madrid or Barcelona (Spain), it will support projects in other European countries (Netherlands, Belgium, and Germany), focusing on the design phase of wastewater treatment plants, drinking water treatment plants, and water transportation and distribution systems. The position will focus on technical design and calculations. It will also involve collaboration with process engineers to support detailed design development, including pump design and other mechanical components. An understanding of water and wastewater treatment processes is highly valuable. Additionally, the role will occasionally provide technical support to the Spain-based environmental consultancy team focused on industrial clients.

The onboarding process will take place in the supported country ((Netherlands, Belgium, and Germany)) for approximately 1–3 months. After this initial period, travel will be occasional.

This role offers a unique opportunity for a motivated professional to grow within the world’s leading design & consultancy firm for natural and built assets. As part of our expanding Iberian team you will work with multinational clients on technically challenging, high-impact projects, benefiting from strong local support from experienced specialists and access to a global network of top-tier Water Treatment experts.

At Arcadis you’ll join a collaborative environment that values technical excellence, knowledge-sharing, and continuous professional development. We reward outstanding performance with clear career progression, long-term relationship building, and ongoing support to help you reach your full potential while contributing to innovation and sustainability.

Role Accountabilities

· Lead and contribute to the design, optimization, and expansion of wastewater treatment plants, prioritizing sustainability, reliability, and circularity.

· Drive innovation by addressing emerging challenges such as the treatment of persistent substances and the recovery of resources and energy.

· Collaborate effectively across disciplines—including civil engineering, process automation, and environmental technology—to deliver integrated, multidisciplinary solutions.

· Guide projects and contribute to project coordination by helping prepare action plans and draft proposals.

· Oversee the planning and execution of renovations and expansions for wastewater treatment plants serving both public and industrial clients.

· Conduct feasibility studies and provide expert advice on technical solutions for national and international water treatment projects.

Qualifications & Experience

· Bachelor’s or master’s degree in Mechanical, Electrical, or Industrial Engineering (or a related discipline).

· Proven experience in the design, optimization, and coordination of water and wastewater treatment projects.

· In-depth knowledge of water and residual flow treatment processes.

· Able to work independently with minimal supervision, while effectively following strategic guidance from the Netherlands-based team.

· Fluent in English and Spanish; proficiency in Dutch, German, or Catalan is a plus.

· Demonstrated ability to mentor and support junior team members within multidisciplinary project environments.

· Result-oriented, customer-oriented and innovative attitude.

· Strong team-working abilities, problem-solving and communication skills, and meticulous attention to detail and quality.

Why Arcadis?

We can only achieve our goals when everyone is empowered to be their best. We believe everyone's contribution matters. It’s why we are pioneering a skills-based approach, where you can harness your unique experience and expertise to carve your career path and maximize the impact we can make together.

You’ll do meaningful work, and no matter what role, you’ll be helping to deliver sustainable solutions for a more prosperous planet. Make your mark, on your career, your colleagues, your clients, your life and the world around you.

Together, we can create a lasting legacy.

Join Arcadis. Create a Legacy.

Our Commitment to Equality, Diversity, Inclusion & Belonging

We want you to be able to bring your best self to work every day, which is why we take equality and inclusion seriously and hold ourselves to account for our actions. Our ambition is to be an employer of choice and provide a great place to work for all our people.

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