Assistant HVAC Engineer

Location/s: Sofia, BG
Recruiter contact: Maria Cervantes

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About the business unit

The Energy unit delivers services to clients globally across several sectors including hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle – from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we’re helping to deliver the energy transition globally.

Overview of the role

Due to new project wins and continued growth, we’re looking for Assistant HVAC Engineer to join our Nuclear: Defence and Civil division. This role offers exciting opportunity to work on innovative projects across the defence and nuclear new-build industries worldwide. As part of our growing team, you will contribute to high-profile engineering challenges while developing your career within an international organisation committed to supporting your professional growth. This role offers the opportunity to work at the forefront of the Nuclear HVAC field, delivering impactful projects for some of the industry’s most prominent clients.

Key responsibilities and duties include:

• Produce detailed design calculations to support design requirements
• Producing documentation, assessment/condition reports, survey reports, basis of designs, procurement specifications, etc
• Production and review of detailed design calculations to support design proposals
• Production and review of detailed design drawings, layouts and schematics including heating, ventilation, LTHW, Chilled Water, specialist LEV and BMS installations using Revit (BIM) and CAD software
• Experience in the delivery of written work, e.g. functional Specifications, Basis of Design, Equipment Specifications and Validation and Verification plans
• Producing estimates of work elements including equipment and man hour costs
• Supporting the preparation of bids and estimates
• Ensure compliance with construction (design and management) regulations
• Conduct thorough research to ensure compliance with industry standards
• Coordinate seamlessly with other disciplines, fostering a holistic approach to project delivery

Candidate specification

Essential:

• Experience in HVAC Design
• Skilled in Revit (BIM modelling), AutoCAD and MS Office suites+
• Experience in using design software like Carrier HAP (Hourly Analyses Program), IES VE simulation software and similar is highly valued. Also, manufacturers selection software
• Strong work ethic and positive attitude
• Effective interpersonal and organizational skills
• Initiative and self-motivation to learn and develop in the field
• Ability to collaborate across borders. Good verbal and written communication skills
• Working proficiency in English is required

Desirable:

• Experience within a highly regulated environment is advantageous (Nuclear preferable, but will consider other relevant experience). Preferably knowledge & experience in Nuclear containment ventilation design
• Familiar with industry standards, legislation, and engineering principles, ideally including knowledge of Nuclear ventilation guidelines and standards will be appreciated
• An interest in implementing automation in the design process and interest in developing the CFD models for cases in the HVAC field is highly valued
• International experience will be highly valued also

Qualifications:

• Master’s (Bachelor’s) degree in mechanical HVAC engineering or related field (essential)
• Registered License Engineer or working towards license registration to relevant professional body is advantageous

Due to the sensitivity of some of our projects, candidates will be required to apply for and obtain UK Security Clearance.

We are actively recruiting a diverse workforce that is reflective of the communities we serve. We recognise that differences in ability, skills and experience are a strength and encourage applications from people of all backgrounds.

We offer some fantastic benefits including:

• 25 days per year annual leave
• Life insurance
• Private Health Insurance -including hospital, out -patient, dental care and mental health service
• Annual company & performance bonus scheme – subject to Company performance
• Annual professional institution subscription (certification at ICE or equivalent)
• Wellbeing support including access to an independent Employer Assistance Scheme, wellbeing champions and access to learning and support resources
• Modern office environment designed to support employee wellbeing, including access to fitness facilities, recreational areas, games rooms, and green outdoor spaces
• 50% cost coverage of MultiSport Card -Providing gym, pool and spa access across Bulgaria

Employee Ownership

• Our employee ownership model means no external investors, just us, creating a culture of shared success.
• Our employees have a stake and a voice in our business, giving them a direct connection to our success through our personal and group performance bonuses.
• As your career grows, so does your stake, recognising your long-term impact and contribution.
• Your voice matters, with the opportunity to connect directly with senior leadership through formal channels to help shape our future.
• For our senior roles you will have a direct pathway towards ownership from day one.

Equality, diversity, and inclusion

We put equality, diversity, and inclusion at the heart of our business, seeking to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they can contribute.

Accessibility

We want you to perform your best at every stage in the recruitment process. If you are disabled or need any support to enable you to apply or attend an interview, please contact us at reasonable.adjustments@mottmac.com and we will talk to you about how we can support you.

Agile working

At Mott MacDonald, we believe it makes business sense for you and your manager to choose how you can work most effectively to meet your client, team, and personal commitments. We offer a hybrid working policy that embraces your well-being, flexibility, and trust.

Apply now, or for more information about our application process, click here.