Mechanical Engineer – Data Center & Critical Facilities
Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Oct 15, 2026. AECOM scores B on the Alion truth index.
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AECOM’s Enterprise Capabilities is seeking a Mechanical Engineer to join the Mechanical Engineering team in Milan, Italy.
The position is suited for engineers with around 5 years of experience in HVAC and mechanical building services, with exposure to data centers or mission-critical facilities.
The role focuses on the design and coordination of HVAC and cooling systems, supporting data center and critical infrastructure projects within multidisciplinary teams.
Key Responsibilities
- Support the design of HVAC and heat rejection systems for data centers and mission-critical environments, considering cooling loads, redundancy concepts, flexibility for phased expansion, airflow management, humidity control, and energy efficiency.
- Contribute to the selection and layout of cooling solutions such as CRAH/CRAC units, chilled water systems, DX systems, in-row cooling, fan wall units, and basic containment strategies, based on project requirements.
- Perform cooling and heating load calculations using industry tools, under the supervision of senior engineers when required.
- Assist in the design of chilled water plants, precision cooling systems, and mechanical ventilation systems, including preliminary equipment sizing and component selection.
- Prepare and support the development of technical drawings, specifications, calculation notes, and reports in English.
- Develop HVAC schematics, basic system architectures, single-line control diagrams, and P&IDs for mechanical systems.
- Support HVAC system modeling in Revit, coordinate with other disciplines, and assist with clash detection activities using Revit and/or Navisworks.
- Work closely with electrical, architectural, and structural teams to ensure coordinated and integrated design solutions.
- Stay updated on data center cooling technologies, HVAC best practices, and applicable international standards.
- Bachelor’s degree in Mechanical Engineering.
- Approx. 5 years of professional experience in HVAC and mechanical systems design for buildings, industrial, or critical facilities.
- Exposure to data center, mission-critical, or high-reliability HVAC systems.
- Familiarity with HVAC and mechanical ventilation system design, Chilled water systems and basic cooling plant, Thermal load calculations and equipment sizing and ASHRAE and general HVAC design standards.
- Working knowledge of design tools such as AutoCAD and/or mechanical calculation software.
- Working knowledge of Revit for HVAC modeling.
- Familiarity with data center design guidelines (e.g. Uptime Institute, TIA-942, ANSI/BICSI).
- Exposure to installation or commissioning phases of HVAC systems.
- Basic understanding of control strategies and sequences of operation.
- Awareness of energy efficiency and sustainability principles.
- Ability to work in multidisciplinary project teams.
- Good level of English, written and spoken.
- Any relevant certifications (data center, energy, sustainability) are a plus but not required.
What We Offer
AECOM: A World of Opportunities and Benefits
Attractive Compensation Package: We offer a competitive salary along with a range of exclusive benefits, including hybrid work, meal vouchers, welfare program, resources for personal well-being and mental health, gym memberships, health insurance, laptop, smartphone, employee assistance program, business travel insurance, service recognition awards, and a pension savings plan.
Office in the Heart of Milan: Central location, with easy access to all the city's conveniences.
Work Flexibility: We offer flexible work options to help you maintain an optimal work-life balance.
Public Transport Allowances: We help cover the costs of your daily commute.
Culture of Equity, Diversity, and Inclusion in Welcoming Workplaces: Our culture promotes a welcoming and respectful work environment. AECOM Italy has obtained gender equality certification.
Professional Growth and Development: We invest in your future with training and development programs to help you achieve your career goals.
This role is covered by the CCNL Commercio e Terziario applied by the Company.
Placement within the salary range will be determined on the basis of objective and neutral criteria, including the skills required for the role, relevant professional experience, the expected level of autonomy and responsibility, and the candidate's alignment with the position requirements.
Any benefits and additional elements of the overall compensation and welfare package will be discussed during the recruitment process.
This offer is open to all genders in compliance with legislative decree 198/2006, and to people of all ages and nationalities according to legislative decrees 215/03 and 216/03.