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Sustainability Officer

MBG Belgium Added on Aug 21, 2026
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As a Sustainability Officer at MBG, you will bridge the gap between high-level ESG strategy and the practical reality of Flemish construction sites. Your primary focus is to support project teams in adopting greener methods, from tracking site-specific carbon emissions to managing technical certifications like BREEAM. You will ensure that regulatory requirements like CSRD and the CO2 Performance Ladder are translated into actionable, economically viable solutions on the ground.

This role is critical because it moves beyond theoretical green targets into tangible site-level decarbonization within the heavy-impact construction industry. By identifying low-carbon materials and optimizing resource use across large-scale industrial and residential builds, you directly influence the environmental footprint of Flanders’ physical landscape. It is about proving that sustainable building is not just a compliance checkbox, but a smarter way to construct.

This suits someone who possesses a technical mindset and thrives in a collaborative, pragmatic environment where the building site is as important as the boardroom.

Job-FAQs

What are the main missions and responsibilities of this role?

The primary mission involves operationalizing sustainability across MBG's construction portfolio. You will act as the technical lead for BREEAM certifications and ensuring the company meets the requirements of the CO2 Performance Ladder and EU Taxonomy. This is not just a reporting role; you are expected to find technical and economic solutions to reduce the environmental impact of active building sites. You will also manage the implementation of digital sustainability tools and climate reporting frameworks. By monitoring new legislation and translating it into practical guidelines, you ensure that every project team understands how to align their work with the company's broader ESG goals without sacrificing site efficiency.

Key learning opportunities for this job

Working in this role provides deep exposure to the construction-specific regulatory landscape in Belgium, including hands-on experience with Flemish environmental tools like TOTEM and Life Cycle Analysis (LCA) methodologies. You will gain expertise in navigating the complexities of the CSRD and how it impacts large-scale engineering and building firms. Additionally, you will have the chance to explore innovative building materials and techniques. Because MBG emphasizes internal knowledge sharing, you will likely develop a multidisciplinary understanding of how procurement, project management, and site operations intersect with environmental science.

How does the ideal candidate look like (experience, skills)?

The ideal candidate holds a Bachelor’s or Master’s degree and brings a pragmatic understanding of the construction industry. While theoretical knowledge is important, the ability to communicate with site managers and technical teams in Dutch is essential for success. You should be comfortable with analytical tools like LCA software and have a functional grasp of BREEAM standards. Soft skills are equally vital; you need to be a collaborative problem-solver who can persuade others of the value of sustainability. Someone who is structured and analytical will thrive here, particularly when dealing with the rigorous documentation required for CO2-Prestatieladder or EU Taxonomy compliance.

Advice to stand out and make a successful application

To stand out, demonstrate your ability to bridge the gap between ESG theory and construction reality. Instead of just listing certifications, explain a time you implemented a sustainable solution that was technically and economically feasible. Show that you understand the specific challenges of the Flemish building sector, such as material constraints or local waste regulations. Highlight your proficiency with specific tools like TOTEM or BREEAM, as these are highly valued by MBG. Since the company values a 'feet-on-the-ground' approach, tailor your cover letter to reflect a balance of technical expertise and a practical, hands-on work ethic.

What aspects of the company's sustainability is this role likely to focus on?

The role focuses heavily on the decarbonization of the built environment. This includes reducing the embodied carbon of materials and the operational carbon of construction sites. You will be the point person for environmental performance, ensuring that projects contribute to MBG's status on the CO2 Performance Ladder. Beyond carbon, there is a strong emphasis on circularity and compliance. You will likely work on material selection to improve LCA scores and ensure that all projects meet the 'Do No Significant Harm' criteria outlined in the EU Taxonomy, reflecting a holistic approach to sustainable development in Flanders.

What are the main challenges someone in this role might face?

One of the main challenges is overcoming the resistance to change that can exist in a traditional, fast-paced construction environment. Balancing ambitious sustainability targets with the economic realities and tight deadlines of a project site requires significant diplomacy and creative problem-solving. Another challenge is the evolving regulatory landscape. Keeping up with the transition from voluntary reporting to mandatory CSRD compliance while maintaining site-level operations can be demanding. You will need to be highly organized to manage documentation across multiple active werven simultaneously.

How could a typical day look like for someone in this position?

A typical day might begin with a site visit to review waste management or energy use with a project team, followed by an afternoon of data analysis to update the company’s carbon footprint tools. You will likely spend time consulting on technical specifications for a new project to ensure it meets BREEAM requirements. Your schedule will involve a mix of internal meetings with supporting services—like procurement or safety—and external coordination with sustainability partners. You will also spend time researching new material innovations or translating a new piece of environmental legislation into a simple one-page guide for the site managers.

What are the opportunities for professional growth and development in this role?

As sustainability becomes increasingly central to the construction bidding process in Belgium, this role offers high internal visibility. You have the opportunity to become a key strategic advisor to the management team as MBG matures its ESG reporting and carbon reduction strategies. Success in this role could lead to Senior Sustainability Lead positions or specialized roles in circular construction and green procurement. As the company continues to innovate, you could also lead large-scale pilot projects involving low-carbon building technologies, positioning yourself as an industry expert in sustainable Flemish infrastructure.

The main stakeholders you might be interacting with

You will interact daily with Project Teams and Site Managers, acting as their primary resource for all things sustainability. You will also work closely with Support Services like Procurement to source greener materials and Quality/Safety teams to ensure integrated reporting. Externally, you will engage with Sustainability Partners and certification bodies for BREEAM or the CO2 Performance Ladder. You may also interact with clients and subcontractors to align environmental standards across the entire supply chain of a construction project.

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