Colas designs, builds and maintains mobility infrastructure, produces materials and offers solutions for roads, railways, ports and airports.
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Colas is recruiting a rail grinding machine operator-fitter in Rugby, UK. The role involves preparing and operating the machines, maintaining them and complying with safety and quality rules.
At Colas, the road and utilities worker carries out roadworks, utilities and masonry work. They prepare the site, follow safety instructions and work as part of a team.
Colas is seeking a workshop mechanic in Saint-Éloy-les-Mines to maintain construction machinery, heavy goods vehicles and light commercial vehicles. The role includes diagnosing mechanical, electrical, electronic, hydraulic and pneumatic faults, as well as carrying out trials and performance tests in accordance with safety rules.
At Colas Digital Solutions, the internship involves designing and developing web applications with a product team. You will gain exposure to the full development cycle, from gathering requirements to deployment, using C#, .NET, React, SQL, Docker and Kubernetes.
At Colas Digital Solutions, the Data Scientist intern will contribute to analysing business data and developing Machine Learning models. The internship also covers generative AI on Microsoft Azure and computer vision experiments.
Within the Data & Analytics department at Colas, the intern will contribute to statistical analysis and data cleansing. Responsibilities include decision-making modelling and creating Power BI dashboards and Power Apps applications.
At Colas’ Chaumes-en-Brie branch, you will analyse tenders for roadworks projects. You will coordinate stakeholders, prepare technical cost estimates and contribute to the technical submission and tender submission.
Within Colas’ Sustainable Materials department, the internship focuses on formulating bituminous binders with bio-based derivatives. The intern will study their rheological properties and ageing, particularly under the effects of UV, then present their results to the research teams. The six-month internship is available from early 2027 in Magny-les-Hameaux.
Within Colas’ Sustainable Materials department, the internship focuses on the chemical modification of vegetable oils and their incorporation into bituminous binders. The intern will assess their properties, ageing, cost and carbon footprint, then present the results to the research teams. The six-month internship is based in Magny-les-Hameaux and focuses on formulation and organic synthesis.
Colas is recruiting an Office Administrator to support the Rail Grinding & Milling team. The role includes administrative tasks, preparing safety documentation and ordering fuel for machinery. Strong organisational and communication skills and proficiency in Microsoft Office are required.
During this final-year internship in Chaumes-en-Brie, you will help analyse tenders and prepare cost estimates and technical submissions. You will also contribute to finalising the technical and financial aspects of bids.
At Colas's CORE CENTER, this final-year internship focuses on the chemical modification of vegetable oils to formulate bituminous binders. You will evaluate their properties, ageing, cost and carbon footprint, then present the results to the research teams.
Within Colas's Sustainable Materials department, the internship focuses on using bio-based derivatives in bituminous binders. You will formulate binders, study their rheological properties and ageing, then present the results to the research teams.
Colas Environnement is seeking a Contaminated Sites and Soils Engineering Intern in Miribel-les-Échets, near Lyon. The role combines field and laboratory work to design and carry out soil remediation projects. It is aimed at a student in their final year of engineering school or studying for a Master 2 in environmental studies, geology, chemistry or physics.
As a subject matter expert at Colas, you will be the point of reference for Swiss payroll, social insurance, HR reporting and compensation. You will manage payroll processes, personnel cost analyses, HR dashboards and digitalisation projects. The role requires substantial experience in Swiss payroll, proficiency in Abacus and Excel, as well as fluent French and professional English.
Colas is looking for a freight train driver to ensure the safe and efficient operation of freight trains across the UK. The role requires strong safety awareness and technical rail skills.
Colas is looking for an Operations Coordinator to ensure the smooth and compliant running of depot operations at its Bescot office. The role covers materials management, stock monitoring and support for winter maintenance, with experience in logistics or highways infrastructure desirable.
Colas is looking for a Project Coordinator to plan, coordinate and deliver projects related to the National Highways Area 9 contract. The role involves working with teams and stakeholders, with experience in highways construction and strong organisational and communication skills.