System Administrator Security Operations

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.FTHybrid90-95KSecOps,, XDR/MDR, Incident Response, Vulnerability Management, DigiCert, PKI, SSL/TLS, Windows Server, Active Directory, IT Infrastructure, FirewallsWe'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 DigiCert and the SSL/TLS certificate lifecycle.Key ResponsibilitiesInfrastructure 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 DigiCert 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.Required QualificationsHands-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.Preferred QualificationsExperience with DigiCert or another certificate authority platform.Familiarity with XDR/MDR tools, Fortinet firewalls, NinjaOne/RMM, and backup solutions.Experience working in an MSP or client-facing IT environment.CompTIA Security+, CySA+, Fortinet, or related certifications.