Senior System Administrator, Linux, AWS

Hosting Senior System Administrator We are seeking a skilled Senior System Administrator to support and enhance our hosted solutions across both private and public cloud environments. This role is essential in ensuring the availability, security, performance and compliance of hosted services against our published service levels and descriptions. The ideal candidate will bring deep expertise in managing complex IT environments and a passion for optimizing infrastructure to deliver worldclass hosting solutions. Infrastructure Management for Private and Public Clouds: Administer and optimize hosted solutions across private and public cloud platforms (e.g., VMware, Azure, AWS). Design, implement, and maintain infrastructure to ensure scalability, performance, and reliability. Manage hybrid cloud setups, ensuring seamless integration and interoperability. Ensure Availability and Performance: Deploy and maintain monitoring solutions for both private and public cloud-hosted systems to identify and resolve issues proactively. Analyse performance metrics and implement optimizations to ensure alignment with SLA requirements. Administer and maintain Citrix Virtual Apps, Remote Desktop Services and Azure Virtual Desktop to deliver hosted applications and ensure a seamless end-user experience. Windows Server Administration: Deploy, configure, and manage Windows Server systems in private and public cloud-hosted setups. Configure and troubleshoot Group Policy Objects (GPOs) to enforce security and operational policies. Ensure hosted environments adhere to industry and regulatory security requirements. Utilize System Center Configuration Manager for software deployments, updates, and compliance in private and public cloud setups. Ensure robust backup management and monitoring Develop and optimize PowerShell scripts to automate administration, monitoring, and incident response across hybrid environments. Streamline processes to reduce manual efforts and improve operational efficiency. Maintain comprehensive documentation of hosted solutions, including configurations, procedures, and troubleshooting guides. Assisting, training and mentoring team members to upskill and follow best practice. Bachelor\’s degree in Computer Science, Information Technology, or related field (or equivalent experience). ~5+ years of experience in a senior IT administration role, ideally with a focus on hosted solutions across private and public cloud environments. ~ Expertise in Citrix NetScaler, Citrix Virtual Apps, RDS, AVD, Azure, SQL Clustering, and SSL Certificates in hosted and hybrid environments. ~ Strong knowledge of Windows Server administration including standardised builds to published standards, Active Directory, Group Policy and DNS. ~ Expertise in identifying and resolving complex issues, including advanced network troubleshooting advanced troubleshooting, and system hardening. ~ Hands-on experience with System Center Configuration Manager (SCCM) for multi-tenant and cloud-hosted setups. ~ Advanced skills in PowerShell scripting for automation in hybrid infrastructures. ~ Familiarity with monitoring tools like Zabbix, PRTG, or other hybrid cloud monitoring platforms. ~ Proven track record of maintaining uptime and security in private and public cloud-hosted environments to meet SLA and compliance requirements. An understanding of how software and related services can improve the effectiveness of Public Sector organisations We do not discriminate against applicants on the basis of age, sex, race, disability, pregnancy, marital status, sexual orientation, gender reassignment or religious background;