Senior Systems Administrator (VMware, Cisco, Palo Alto)
Emerald Resource Group
Senior Systems Administrator (VMware, Cisco, Palo Alto) Location: Cleveland, OH Position Summary The Senior Systems Administrator is responsible for the design, administration, security, and support of enterprise IT infrastructure across on-prem and cloud environments. This role requires strong hands-on expertise with VMware virtualization, Cisco networking, Palo Alto firewalls, Azure cloud services, Splunk monitoring, backup systems, and PCI-compliant environments . The ideal candidate is a proactive problem-solver who ensures infrastructure reliability, security, and compliance. Key Responsibilities
- Administer, maintain, and optimize VMware vSphere / ESXi environments, including virtual servers, storage, and high availability
- Manage and support Cisco network infrastructure , including switches, routers, VLANs, routing, and troubleshooting
- Configure, maintain, and optimize Palo Alto firewalls , including security policies, NAT, VPNs, rule sets, and threat prevention
- Monitor system, network, and security events using Splunk ; analyze logs, create alerts, and respond to incidents
- Support and administer Microsoft Azure infrastructure, including virtual machines, networking, and hybrid integrations
- Ensure systems and network configurations meet PCI-DSS compliance requirements and internal security standards
- Manage backup and disaster recovery solutions , including backup verification, restores, and documentation
- Perform system patching, upgrades, and lifecycle management for servers, network devices, and security platforms
- Troubleshoot complex issues across systems, networking, virtualization, cloud, and security layers
- Collaborate with IT security, application teams, vendors, and auditors to support business and compliance needs
- Participate in on-call rotations and provide after-hours support as required
- Maintain accurate documentation for infrastructure, configurations, procedures, and changes
- 3+ years of experience as a Senior Systems Administrator, Infrastructure Administrator, or similar role
- Strong hands-on experience with VMware vSphere / ESXi in enterprise environments
- Solid knowledge of Cisco networking (switching, routing, TCP/IP, VLANs)
- Hands-on experience administering Palo Alto firewalls
- Experience with Splunk or similar log management and monitoring tools
- Working experience with Microsoft Azure (hybrid or cloud-based infrastructure)
- Experience supporting environments subject to PCI-DSS compliance
- Experience managing backup and disaster recovery systems
- Strong troubleshooting skills across systems, networks, and security
- Certifications such as VMware (VCP) , Cisco (CCNA/CCNP) , Palo Alto (PCNSE/PCNSA) , or Azure (AZ-104)
- Experience with Windows Server environments (Linux experience a plus)
- Scripting or automation experience (PowerShell, Bash, Python)
- Experience with vulnerability management or security hardening
- Experience supporting highly available or mission-critical environments
- Strong communication and documentation skills
- Ability to work independently and manage multiple priorities
- Detail-oriented with a security-first mindset
- Comfortable working in a fast-paced, production environment
- Hands-on senior role with ownership across infrastructure, networking, security, and cloud
- Exposure to enterprise systems and regulated environments
- Opportunity to influence infrastructure reliability, security, and compliance posture
Vacancy posted 2 days ago
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