Senior Systems Administrator

Accountabilities: Provide Tier 2 and Tier 3 technical support, serving as the primary escalation point for complex infrastructure, authentication, Microsoft 365, access, and system-level issues. Troubleshoot and resolve advanced user, system, and performance issues across hybrid cloud and on-premises environments. Manage employee onboarding, offboarding, and lifecycle activities across identity platforms, applications, and devices. Deploy, configure, and maintain hybrid server, storage, networking, and endpoint infrastructure across organizational sites. Configure and deploy applications through centralized management tools such as Company Portal. Develop, maintain, and optimize automation scripts using PowerShell, Python, Bash, or similar technologies to streamline operational processes. Manage, monitor, and validate backup, restoration, and disaster recovery solutions for hybrid systems. Perform regular system updates, patching, and security-hardening activities to maintain stability and compliance. Support container deployments, updates, troubleshooting, and availability management. Lead infrastructure projects by translating business and technical requirements into solutions and coordinating implementation across teams. Implement, maintain, and improve security policies and technical controls across cloud and on-premises environments. Conduct security assessments, vulnerability remediation, and compliance validation in collaboration with security and governance teams. Coordinate with security and incident response teams on investigations, containment measures, and forensic activities. Implement and administer monitoring and observability solutions, including Azure Monitor and Zabbix. Configure alerts and notifications to identify infrastructure issues and performance degradation proactively. Analyze infrastructure performance metrics and implement optimization strategies to improve reliability, scalability, and efficiency. Troubleshoot complex system failures and coordinate resolution efforts across cross-functional teams. Maintain accurate technical documentation, architectural diagrams, and operational runbooks. Participate throughout the infrastructure lifecycle, including requirements gathering, design, deployment, testing, integration, cutover, and ongoing maintenance. Configure and deploy servers, storage, networking equipment, and endpoint devices across organizational locations. Maintain the cybersecurity posture of assigned systems through sound security engineering practices, including access controls, least-privilege principles, centralized authentication, and vendor-recommended security configurations. Perform additional job-related responsibilities as assigned. Requirements: Bachelor's degree in a related field or equivalent professional experience in place of a degree. At least 6 years of relevant systems administration experience. CompTIA Security+ CE certification or an equivalent qualification. Practical scripting experience with Python, PowerShell, Bash, or similar languages. Knowledge of at least five of the following technologies or areas: Windows Server 2019 and 2022. Windows 11. Ubuntu 22.04 LTS. iDRAC and iLO. Docker. Enterprise networking. Endpoint security. Vulnerability remediation. Knowledge of at least five of the following cloud technologies: Virtual machines. Azure vWAN, vHub, VNets, subnets, WAF, and Application Gateway. SharePoint and Exchange. Microsoft Entra ID. Azure Virtual Desktop. Azure Update Manager. Key Vaults, Storage Accounts, and Managed Identities. Strong analytical, troubleshooting, and problem-solving abilities. Excellent communication skills, with the ability to explain technical issues to both technical and non-technical audiences. Ability to work effectively in a fast-paced environment, manage competing priorities, and maintain attention to detail. Commitment to operational excellence, system reliability, and continuous improvement.