Senior Systems Administrator

Sr. Systems Administrator is responsible for leading the design, implementation, maintenance, and optimization of an organization’s IT infrastructure. This role ensures the reliability, security, and scalability of systems and networks while providing advanced technical support and mentoring to junior staff. The Senior System Administrator collaborates with IT leadership and cross-functional teams to plan and execute system upgrades, cloud integrations, and enterprise-level projects.

Responsibilities:

Typical Responsibilities/Tasks:

Design, implement, and maintain enterprise IT systems, including servers, storage, virtualization, and network infrastructure.

Ensure system performance, availability, and security across on-premises, cloud, and hybrid environments.

Plan and execute system upgrades, migrations, and consolidations.

Monitor system health, performance, and capacity, proactively addressing issues.

Develop and maintain backup, disaster recovery, and business continuity processes.

Implement and enforce security policies, patch management, and vulnerability remediation.

Provide expert-level support for complex technical issues across systems, networks, and applications.

Guide and mentor junior administrators and IT support staff.

Serve as escalation point for critical incidents and outages

Advanced expertise in Windows Server, Linux/Unix, and hybrid IT environments.

Knowledge of networking, firewalls, storage solutions, and virtualization (VMware, Hyper-V).

Experience with cloud platforms (AWS, Azure, Google Cloud) and cloud migration strategies.

Proficiency in scripting and automation (PowerShell, Bash, Python, Ansible, Terraform).

Strong understanding of security principles, identity/access management, and compliance standards.

Basic Qualifications:

10+ years of progressive experience supporting enterprise IT infrastructure, with demonstrated leadership in incident response and cross-team coordination.

Proven experience operating and maintaining high-availability (HA) environments.

Extensive experience with Windows Server, Hyper-V, and VMware administration.

Experience with identity and access management platforms, including Active Directory, ADFS, and Microsoft Entra.

Experience managing Microsoft 365, Azure, and AWS environments.

Experience supporting enterprise networking and telecommunications systems.

Proven track record leading root cause analysis and driving preventive measures.

Strong verbal and written communication skills, with the ability to translate complex technical issues for varied audiences.

Demonstrated ability to build and maintain effective partnerships across teams to deliver scalable solutions.

Preferred Qualifications:

Bachelor's degree in Information Technology, Computer Science, Engineering, or related field, or equivalent work experience.

Experience administering Palo Alto Networks firewalls, including security policies, VPN connectivity, and threat prevention.

Experience deploying and supporting Cisco Meraki networking solutions.

Knowledge of network segmentation, zero trust principles, and enterprise security architecture.

Familiarity with mobile device management (Intune, MaaS360).

Exposure to compliance frameworks (e.g., HIPAA, SOC 2, NIST).

Arbeitsort: Homeoffice