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 world-class hosting solutions.

Key Responsibilities:

• 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: Maintain high availability of hosted services in order to meet SLAs. Implement redundancy, disaster recovery, and failover mechanisms to minimize downtime. 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.
• Presentation Tier Administration: Manage and maintain Citrix NetScaler for load balancing, secure access, and application delivery. 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. Perform advanced troubleshooting to quickly resolve issues affecting hosted environments.
• Security and Compliance: Implement and maintain robust security protocols for hosted solutions, including firewalls, encryption, and access controls. Conduct regular security audits, vulnerability assessments, and patch management to meet compliance standards. Ensure hosted environments adhere to industry and regulatory security requirements. Utilize System Centre Configuration Manager for software deployments, updates, and compliance in private and public cloud setups. Ensure robust backup management and monitoring.
• Automation and Scripting: 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.
• Documentation and Collaboration: Maintain comprehensive documentation of hosted solutions, including configurations, procedures, and troubleshooting guides. Collaborate with cross-functional teams and clients to design and implement tailored hosted solutions.
• Leadership: Assisting, training and mentoring team members to upskill and follow best practice.

Skills & Qualifications:

• 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 and system hardening.
• Hands-on experience with System Centre 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.

To be successful, you should bring:

• An understanding of how software and related services can improve the effectiveness of Public Sector organisations.
• A consultative approach, able to influence others to support objectives.
• Demonstrable ability to communicate, present and influence key stakeholders.
• Experience delivering customer-focused solutions to customer needs.
• Proven ability to juggle multiple issues, while maintaining sharp attention to detail.
• Excellent listening and communication abilities.
• An ability to form strong and mutually beneficial business relationships.
• A track record of achieving targets, goals, and objectives.
• Strong written, listening, and oral communication skills.
• High level of commitment and passion for achieving levels of service excellence.
• Excellent time management and prioritisation skills.

ersg are an equal opportunities employer; we are committed to promoting equality of opportunity for all job applicants. We do not discriminate against applicants on the basis of age, sex, race, disability, pregnancy, marital status, sexual orientation, gender reassignment or religious background; all decisions are based on merit.