We are seeking a Senior Infrastructure Engineer to join a global IT function within an international Oil andamp; Gas Exploration andamp; Production organisation.This is a hands-on technical leadership role operating in a fast-paced, multi-site environment. You will take ownership of designing, supporting, and continuously improving a hybrid infrastructure spanning on-premises data centres and Microsoft Azure, while acting as a senior escalation point and mentor within the team.Key Responsibilities: Designing, building, and maintaining global IT infrastructure across on-prem and cloud platformsManaging and optimising a hybrid Microsoft environment including Azure, Entra ID, and modern device managementAdministering and supporting Windows and Linux server estates and core Microsoft servicesActing as 3rd-line escalation for complex infrastructure and platform issuesLeading infrastructure projects including upgrades, migrations, and new implementationsCollaborating with international stakeholders to ensure reliable, consistent IT service deliveryContributing to the global IT roadmap and mentoring junior infrastructure engineers Must have the following: 7+ years'' experience in a senior infrastructure engineering role within a global or multi-site environmentProven experience managing SCCM environments (including CMG, distribution points, multi-site setups, and Azure integration)Strong communication skillsDeep expertise in Microsoft infrastructure and identity services, including