Systems and Security Administrator

Keep a cybersecurity firm’s own technology secure, available, and running smoothly. This role combines hands‑on administration across Microsoft 365, identity, endpoints, networks, servers, and security tools with the organization, documentation, and service mindset needed to support 50+ employees, while independently balancing support requests, maintenance, projects, and security incidents.

HALOCK Security Labs is a full-service information security consulting firm in Schaumburg, Illinois. Since 1996, we have provided technical security expertise and strategic advisement across penetration testing, red teaming, malware defense, incident response, risk, and compliance.

At HALOCK, internal IT is not a back-office function. Our clients trust us to protect their environments, so the security, reliability, and responsiveness of our own systems directly reflect who we are. As our Systems and Security Administrator, you will work alongside experienced security consultants and business leaders in a high-trust environment where you are expected to own outcomes, surface risks early, and continuously improve how our technology is run and secured.

Regular on‑site presence is required to support office, network, and infrastructure systems.

• Own the employee technology lifecycle, including onboarding, offboarding, account provisioning, access removal, endpoint setup, asset recovery, and inventory tracking
• Administer Microsoft 365, including Exchange Online, SharePoint, One Drive, Microsoft Entra , Microsoft Defender, MFA, Conditional Access, user and group administration, and license management
• Manage Active Directory, Group Policy, role‑based access control, and identity and access management to keep access appropriate and least‑privileged
• Monitor and maintain security technologies such as Sophos Endpoint and Firewalls, Proofpoint, Tenable/Nessus, Microsoft Defender, and Imperva; triage security alerts and drive vulnerability remediation and patching
• Maintain network and infrastructure systems, including Cisco switches, wireless access points, VPNs, firewalls, internet service providers, VMware vCenter/ESXi, Windows servers, and colocation or datacenter services
• Run backup, recovery, and disaster‑recovery processes, including backup monitoring, failed‑job remediation, restore testing, and recovery documentation
• Support business and SaaS applications, office technology, conference‑room equipment, printers, physical access systems, and video surveillance/NVR systems
• Troubleshoot issues across endpoints, cloud services, email, identity, networks, servers, business applications, and security tools
• Manage vendors and keep clear documentation of systems and procedures

• 3–5 years of IT operations, systems administration, network administration, or cybersecurity support experience, preferably supporting a small‑to‑mid‑sized organization of approximately 50 or more employees
• Experience managing employee technology lifecycle activities, including onboarding, offboarding, account provisioning, access removal, endpoint setup, asset recovery, and inventory tracking
• Strong hands‑on Microsoft 365 administration experience, including Exchange Online, SharePoint, One Drive, Microsoft Entra /Azure AD, Microsoft Defender, MFA, Conditional Access, user/group administration, and license management
• Working knowledge of Active Directory, Group Policy, role‑based access control, endpoint provisioning, and identity/access management
• Experience supporting and monitoring cybersecurity technologies, including Sophos Endpoint and Firewalls, Proofpoint, Tenable/Nessus, Microsoft Defender, Imperva, vulnerability management, patching, backup/recovery, and security alert triage
• Experience managing…