We are looking for a Senior Systems Engineer to join an international infrastructure project for a client based in Portugal . This full remote position involves managing complex environments, optimizing systems, and solving enterprise-level challenges in collaboration with global IT teams. Tasks Manage and administer Active Directory environments: forests, domains, sites, DC, DNS, and DNS forwarding. Perform Kerberos ticket analysis, signing traffic troubleshooting, and cross-domain issue resolution. Automate and maintain system tasks with PowerShell scripting. Execute backup, restore, and disaster recovery strategies. Oversee Citrix environments: installation, configuration, upgrades, and troubleshooting. Manage Relay services: upgrades, tracking, and issue resolution. Administer ADFS and Azure SSO: creation of new relying party trusts, SSO applications, and troubleshooting. Provide server administration for physical and virtual servers, including OS upgrades and troubleshooting. Oversee DFS (File Server) administration.
Requirements
10+ years of hands-on experience in Active Directory administration. Strong knowledge of domain relationships, DNS & DNS forwarding, and GPO. Expertise in troubleshooting Kerberos, signing traffic, cross-domain issues, and Event ID error analysis. Proven experience with Windows operating systems and Citrix administration. Solid skills in PowerShell scripting, system backup/restore, and disaster recovery. Mandatory: Portuguese (C2), English (B1), Spanish (A2). Nice to have Microsoft Engineer certification relevant to the environment. Understanding of ITIL processes (incident, change, problem management).