Job details

Trainee / Junior Buildings Consultant

Company details

Established in 1999, 3E is an independent consultancy service and software product company providing solutions to improve renewable energy system performance, optimise energy consumption and facilitate grid and market interaction. 3E focuses on guiding customers towards high standard economically optimised solutions in wind energy, solar energy, sustainable building and site optimisation, power infrastructure and energy markets.

A fast-moving SME, 3E was awarded with the Gazelle trophy for its fast growth in 2011. It also received the Top Employer Award in 2012.


3E’s Buildings & Sites Team is looking for a trainee / junior consultant who is passionate about energy concepts and sustainability in buildings and urban sites.

Our clients include real estate developers, architects, contractors, building product manufacturers, energy utilities, maintenance companies, and regional and international public authorities.

You join a team of multidisciplinary experts dedicated to providing high-quality advice from the design to operations phase, focussing on the technical and economical aspect of the energy and comfort concept design and the broader sustainability approach.

You contribute to a wide range of projects, including:

  • Energy and comfort concept design studies and certification (thermodynamic simulations, EPB, PHPP, WELL…) for buildings & urban sites
  • Sustainability guidance & certification (e.g. BREEAM,)
  • Strategy & policy projects for public authorities or private industry players
  • Expert input studies eg dynamic simulations, CFD, LCA, ESCO, heat networks, energy & storage,…

In a first phase, you will be contributing to such projects, providing input to your project manager. Gradually, you will grow into managing your projects in terms of resource and cost planning, execution and quality of content, while closely liaising with the client and the project team


  • Graduate or Master of Science in Engineering or Architecture or similar field of study, or equivalent through experience / enthusiasm
  • Strong interest in sustainability and energy in real estate
  • A first work/internship experience in minimal one of the described fields of activity is a very strong plus (EPB, PHPP, BREEAM, dynamic simulations,..)
  • Proficiency with MS Office (Word/Excel), strong overall computer skills and ability to learn multiple software tools
  • Knowledge of relevant software / tools / programming languages is a plus (EPB, PHPP, IESVE, TRNSYS, BREEAM, Modelica, Python, VBA,…)


  • Fluent in Dutch, French and English
  • Strong organisational and time management capabilities, ability to prioritise based on time, budget and quality
  • Consultancy mindset: client-oriented, able to identify key issues, assess their implications and communicate complex subjects in readily understandable terms
  • High sense of responsibility and professional attitude
  • Client-oriented and strong communication skills, both oral and in writing
  • Technical, analytical and creative mind-set


In addition to a stimulating atmosphere in a young and highly motivated group of people, 3E offers:

    • Attractive salary package in line with your level of experience, including group insurance, hospital insurance, meal vouchers, representation allowance and company mobile phone
    • Sustainable transport: Easy access with public transport, 100% reimbursement of public transport fare
    • An international environment: projects in over 40 countries worldwide, colleagues of over 20 nationalities

  • Placed on:Tue 14 November 2017
  • Location: Brussels


Kalkkaai 6 Quai à la Chaux
1000 Brussels



For more information:
at the number: +32 (0)2 229 28 94
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