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Sustainability Consultant (Principle)

Anthesis Group · Belgium

Posted September 19, 2026·Closes December 4, 2026

About the Role

A Senior/Principal Sustainability Consultant will be responsible for a portfolio of clients and will lead a small team of junior consultants. Working on both national and international client cases. What we expect can be divided in two major areas: Client & Project Delivery & Business Development 

Key Responsibilities

  • Manage the delivery of consulting projects, ensuring they are delivered on time, within budget and to a high standard of quality.
  •  Act as a strategic point of contact for clients, building strong relationships and ensuring successful project delivery. 
  •  Provide expert input and quality assurance across projects, reviewing work and ensuring high-quality deliverables. 
  •  Develop and present reports and presentations, and facilitate workshops where required. 
  •  Support the development of proposals and contribute to winning new business alongside our commercial teams. 
  •  Contribute to the development and improvement of our sustainability services, creating templates, supporting training and sharing your expertise internally. 
  •  Manage and support a small team of junior consultants, helping them develop their skills and grow within the team. 
  •  Help drive the growth of our Belgian market, working closely with commercial colleagues. 
  •  Depending on your experience and interests, you may specialise in areas such as GHG calculations, decarbonisation, supplier engagement, LCA, circular economy and other sustainability topics.

Skills, Knowledge & Expertise

  • 5+ years of experience in sustainability consulting or a sustainability-focused client-side role.
  •  Strong technical expertise in GHG accounting (Scopes 1, 2 and 3) and decarbonisation planning, including supplier engagement and complex value chain analysis. 
  •  Experience with sustainability due diligence requirements, both voluntary (e.g. SBTi, EcoVadis) and regulatory (e.g. CSDDD, EUDR). 
  •  Strong Excel skills (intermediate level or above), with experience in data analysis and modelling. 
  •  Excellent project management and communication skills, with confidence presenting to clients, facilitating discussions and communicating complex topics clearly. 
  •  A university or higher education background in Industrial Engineering, Energy Engineering, Sustainable Energy Technology, Climate Studies, Business Administration, Sustainability Science & Policy, or a related field. 
  •  A genuine interest in sustainability, climate change, circular economy and the energy transition. 
  •  A proactive, analytical and organised approach, with the ability to quickly get up to speed on new topics and take ownership. 
  •  A collaborative mindset and enthusiasm for working in an international environment. 
  • Fluent Dutch (native or full professional proficiency) and English are essential. French is a plus.

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