Senior Mechanical Engineer

AECOM's Enterprise Capabilities team is looking for a Senior Mechanical Engineer to join our team in Bucharest, Romania.

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.

AECOM is seeking a Senior Mechanical Engineer with proven expertise in rotating equipment to join our team in Bucharest (hybrid work available). The role focuses on the design, specification, and integration of rotating machinery such as pumps, blowers, compressors, and mixers. Strong experience in piping systems and water/wastewater treatment equipment will be considered a major advantage, while knowledge of static equipment (tanks, vessels, heat exchangers) will be an additional asset.

Here is what you will do:

• Lead the design, specification, and integration of rotating equipment (pumps, blowers, compressors, mixers, aeration systems) will represent primary focus.
• Prepare and review datasheets, calculations, specifications, and technical reports, with emphasis on rotating machinery.
• Providing technical input on piping systems and water/wastewater treatment equipment (screens, grit chambers, sludge handling, chemical dosing, disinfection units) will be considered a very strong advantage.
• Contributing to the review and coordination of static equipment (tanks, vessels, filters, heat exchangers) when required will be considered an advantage.
• Ensure compliance with project requirements, applicable standards (ASME, API, AWWA, ISO), and client expectations.
• Coordinate mechanical interfaces with process, structural, electrical, and I&C disciplines.
• Review vendor documentation for compliance with project specifications and participate in design reviews.
• Develop mechanical equipment layouts, general arrangement drawings, and piping designs (2D/3D).
• Support preparation of material requisitions, BOQs, and project documentation.
• Mentor junior engineers and provide technical guidance across the design team.
• Collaborate effectively with other AECOM offices and international project teams.

Minimum Requirements:

• Bachelor's degree in Mechanical Engineering or related field.
• Minimum 12 years of experience in mechanical design with strong focus on rotating equipment.
• Proven expertise in pumps, blowers, compressors, mixers, and aeration systems (mandatory).
• Experience in piping design and water/wastewater treatment facilities (very strong advantage).
• Knowledge of static equipment such as tanks, vessels, filters, heat exchangers (advantage).
• Hands-on field experience in installation supervision, testing, or commissioning of water or wastewater treatment plants is a strong advantage.
• Examples include participation in site inspections, equipment installation checks, commissioning of pumping systems, or troubleshooting of treatment plant mechanical systems.
• Proficiency in 2D and 3D modeling tools such as AutoCAD, MicroStation, AutoCAD Plant 3D, and Revit.
• Familiarity with international design standards and codes (ASME, AWWA, API, ISO).
• Excellent coordination and communication skills in English.
• Strong analytical, organizational, and problem-solving skills.
• Demonstrated ability to manage work within scope, schedule, and budget.

Preferred Qualifications:

§  Experience working with US, UK, or Middle East water/wastewater design projects.

§  Chartered or licensed professional engineer status (or eligible).

Team Collaboration

§  Self-motivated, responsible, and committed to quality.

§  Capable of working collaboratively in multidisciplinary teams.

§  Demonstrates initiative and ownership in delivering project deliverables.

§  Communicates clearly and efficiently with team members, other disciplines, and clients to ensure smooth coordination and understanding across all project stages.

Here's what we're looking for:

Bachelor's degree in Mechanical Engineering or related field.

• Minimum 12 years of experience in mechanical design with strong focus on rotating equipment.
• Proven expertise in pumps, blowers, compressors, mixers, and aeration systems (mandatory).
• Experience in piping design and water/wastewater treatment facilities (very strong advantage).
• Knowledge of static equipment such as tanks, vessels, filters, heat exchangers (advantage).
• Hands-on field experience in installation supervision, testing, or commissioning of water or wastewater treatment plants is a strong advantage.
• Examples include participation in site inspections, equipment installation checks, commissioning of pumping systems, or troubleshooting of treatment plant mechanical systems.
• Proficiency in 2D and 3D modeling tools such as AutoCAD, MicroStation, AutoCAD Plant 3D, and Revit.
• Familiarity with international design standards and codes (ASME, AWWA, API, ISO).
• Excellent coordination and communication skills in English.
• Strong analytical, organizational, and problem-solving skills.
• Demonstrated ability to manage work within scope, schedule, and budget.

Preferred Qualifications:

• Experience working with US, UK, or Middle East water/wastewater design projects.
• Chartered or licensed professional engineer status (or eligible).

Team Collaboration

• Self-motivated, responsible, and committed to quality.
• Capable of working collaboratively in multidisciplinary teams.
• Demonstrates initiative and ownership in delivering project deliverables.
• Communicates clearly and efficiently with team members, other disciplines, and clients to ensure smooth coordination and understanding across all project stages.

At AECOM, you will have freedom to grow in a world of opportunity

Our Freedom to Grow hybrid working philosophy is the cornerstone of our success as a business – supporting a culture of flexibility, trust and performance at AECOM.

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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  

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.