Infrastructure Administrator

Own the security, protect the infrastructure, and take the lead on PKI in a hands-on role where your expertise makes a real impact every day.

FT

Hybrid

90-95K

Sec Ops,, XDR/MDR, Incident Response, Vulnerability Management, Digi Cert, PKI, SSL/TLS, Windows Server, Active Directory, IT Infrastructure, Firewalls

We're seeking a hands-on Infrastructure & Security Administrator to support and secure a business's IT environment. This role combines systems administration, infrastructure maintenance, and day-to-day security operations, with primary ownership of Digi Cert and the SSL/TLS certificate lifecycle.

• Infrastructure Administration: Maintain Windows Server, Active Directory, endpoints, patching, backups, and general systems operations.
• Security Operations: Monitor XDR/MDR alerts, assist with incident investigations, coordinate remediation, and support vulnerability management and security hardening.
• PKI & Certificate Management: Own Digi Cert administration, manage SSL/TLS certificates and renewals, maintain certificate inventories, and troubleshoot certificate-related issues.
• Network Security: Support firewall policies, DNS, access controls, and network security in collaboration with IT teams.
• Monitoring & Documentation: Maintain system and security documentation, track certificate expirations, and identify opportunities to improve reliability and reduce risk.
• Client Support: Communicate technical issues, remediation steps, and recommendations clearly to internal stakeholders and clients as needed.

• Hands-on experience in IT infrastructure, systems administration, or a similar technical role.
• Working knowledge of security monitoring, incident response, vulnerability management, and remediation.
• Experience managing digital certificates, PKI, SSL/TLS, or a similar certificate management platform.
• Familiarity with Windows Server, Active Directory, DNS, firewalls, and network troubleshooting.
• Strong troubleshooting, documentation, and communication skills.

• Experience with Digi Cert or another certificate authority platform.
• Familiarity with XDR/MDR tools, Fortinet firewalls, Ninja One/RMM, and backup solutions.
• Experience working in an MSP or client-facing IT environment.
• CompTIA Security+, CySA+, Fortinet, or related certifications.