Mechanical Engineer – HVAC & Critical Facilities

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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 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.