Senior Cost Controller (Wallonia & Luxembourg)

Job description

Are you a finance professional with a passion for analysing complex projects, challenging figures, and driving business performance? Do you enjoy working closely with operational teams and turning financial data into meaningful insights? Join BESIX and contribute to some of Belgium’s and Luxembourg's most exciting construction projects. For our Business Unit Belgium & Luxembourg, we are looking for a Senior Cost Controller to strengthen our Finance team. As a Senior Cost Controller, you will play a key role in ensuring accurate project reporting, supporting project management teams, and providing financial expertise throughout the project lifecycle. You will mainly support projects located in Wallonia and Luxembourg (approximately 80%), combining office-based work at our Brussels headquarters (approximately 20%). Your Responsibilities Manage and coordinate the monthly cost control and reporting process for your assigned projects. Analyse project performance, identify risks and opportunities, and challenge financial assumptions where necessary. Review and validate project cost control data in collaboration with Project Managers and operational teams. Ensure the accuracy, consistency, and reliability of financial information and reports. Support Project Managers by providing timely financial insights and performance analyses. Act as a business partner for project teams and ensure that all relevant accounting and financial data are properly communicated. Contribute to the continuous improvement and simplification of cost control processes and reporting tools. Prepare and present financial analyses and recommendations to the Cost Control Manager and other stakeholders. Master's degree in Finance, Economics, Business Engineering, or a related field. Minimum 5 years of professional experience, including experience in cost control, project controlling, audit, finance, or a similar analytical role. Strong analytical mindset with excellent attention to detail. Ability to work independently while collaborating effectively with multidisciplinary teams. Confident communicator capable of challenging and influencing stakeholders at different levels. Fluent in French and English. Dutch is considered a strong asset. Proficient in Microsoft Office, particularly Excel. Affinity with project-based environments such as construction, engineering, or infrastructure is a plus. A career at BESIX is a lot more than just a job, it's about being part of our changing and innovative world. Your skills, ambition and passion will contribute to the development of our different businesses and allow us to succeed in the challenges of the coming years. Working for the BESIX group allows you to be a part of a dynamic, creative and entrepreneurial company. It gives you a safe and collaborative working environment with ambitious and innovative goals for the world of tomorrow, but also for your career and personal development. We are looking for different kinds of personalities, mindsets, backgrounds and genders to build the iconic and sustainable projects of tomorrow. In line with its behavior of “Be Inclusive”, BESIX intends to accommodate for any reasonable accommodation (non-disproportionate burden), tangible or intangible, that would neutralize the limiting influence of an inappropriate environment on the participation of a person with a disability. Talk to your recruiter when applying. Are you ready to make an impact and leave a positive legacy for years to come? If you are passionate about our purpose: “We take on today’s boldest challenges to build a lasting legacy” , come and join our caring BESIX family. Together we will co-create our future. Working at BESIX brings a lot of great benefits including: An attractive remuneration package including a salary in line with the market and a range of employee benefits such as flexible mobility advantages, extra-legal pension, medical care insurance, work-life balance program (such as teleworking, flexible work schedule, mobile working), Health Management (sport, health check-up program, …); Career development programs that serve not only to ensure that you are constantly learning and improving but also that give you the possibility to expand your career horizon; A dynamic, creative and safe working environment with innovative colleagues supporting your endeavors (ideas, projects, goals, ambitions); Possibility to work on complex projects within both a local and international environment; The choice to remain locally anchored for the coming years or to seek an exciting international career opportunity within the group. BESIX Group is a leading multidisciplinary Belgian Group, active in construction, real estate development, and concessions. Founded in 1909, BESIX has grown impressively and now operates across Northern and Eastern Europe, North and Central Africa, the Middle East (via BESIX Construct), as well as in Australia. The Group distinguishes itself through its internal Engineering Department, offering deep expertise in geotechnical engineering, concrete technology, planning, BIM, System Engineering, and other advanced tools. BESIX achieved a turnover of EUR 4.1 billion in 2025 and employs approximately 10,000 people across 26+ countries, representing over 80 nationalities. BESIX is committed through sustainable and responsible practices to leave a positive legacy. We integrate Environmental, Social, and Governance (ESG) principles into our operations. From reducing carbon emissions and promoting circular construction to fostering inclusive workplaces and ethical governance. Our sustainability charter and roadmap guide us in creating long-term value for communities, clients, and future generations. Learn more at: