Systems and Security Administrator

Halock; Schaumburg (IL); On-site; USD 80,000 - 110,000; Full time

Benefits offered by this job

Health coverage

Dental coverage

401(k)

Training & certifications

Conference attendance

Job summary

HALOCK Security Labs is seeking a Systems and Security Administrator to own end-to-end IT operations for a 50+ employee environment in Schaumburg, IL. You will administer Microsoft 365, manage identity and access, and maintain security tools across endpoints, networks, and servers.

You will work alongside security consultants in a high-trust setting, balancing on-site responsibilities with proactive maintenance, incident handling, and documentation to keep systems secure and reliable.

Qualifications

• 3–5 years of IT operations, systems administration, network administration, or cybersecurity support experience.
• Experience managing employee technology lifecycle activities (onboarding/offboarding/provisioning).
• Strong hands-on Microsoft 365 administration experience (Exchange Online, SharePoint, OneDrive, Entra ID, Defender, MFA, CA, license mgmt).
• Working knowledge of Active Directory, Group Policy, RBAC, IAM.
• Experience supporting monitoring cybersecurity technologies (Sophos, Proofpoint, Tenable/Nessus, Defender, Imperva).
• Experience managing network/infrastructure systems (Cisco, VMware vCenter, Windows servers, datacenters).
• Experience with backup/recovery, disaster recovery, and documentation.
• Ability to troubleshoot across endpoints, cloud services, networks, servers, and security tools.

Responsibilities

• Own the employee technology lifecycle (onboarding, offboarding, provisioning, access removal).
• Administer Microsoft 365 services (Exchange Online, SharePoint, OneDrive, Entra ID, Defender, MFA, CA).
• Manage Active Directory and IAM to enforce least-privilege access.
• Monitor and triage security alerts, drive remediation with tools like Defender and Nessus.
• Maintain network/infrastructure (Cisco, VPNs, firewalls, VMware, Windows servers).
• Run backup, restore, and disaster-recovery processes with documentation.

Skills

Microsoft 365

Active Directory

Security tooling

Network administration

Vulnerability management

Backup recovery

On-site support

Vendor management

Tools

Sophos Endpoint

Nessus/Tenable

Microsoft Defender

Imperva

VMware vCenter

Cisco switches

Job description

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.

About HALOCK

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.

The Role

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.

What You’ll Do

• 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, OneDrive, Microsoft Entra ID, 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

What You Bring

• 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, OneDrive, Microsoft Entra ID/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 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
• Experience with backup, recovery, and disaster‑recovery processes, including backup monitoring, failed‑job remediation, restore testing, and recovery documentation
• Ability to troubleshoot issues across endpoints, cloud services, email, identity, networks, firewalls, servers, business applications, and security tools
• Strong organizational, documentation, communication, vendor‑management, and customer‑service skills, with the ability to prioritize support requests, maintenance, projects, and security incidents

Strong Pluses

• Familiarity with business and SaaS applications such as RingCentral, Zoom, DocuSign, HubSpot, GitLab, Azure DevOps, GoDaddy DNS, WordPress/WPEngine, Zendesk, Great Plains, and secure file‑transfer platforms
• Experience supporting office technology, including printers, conference‑room equipment, physical access systems, video surveillance/NVR systems, and IT asset inventory

Nice to Have

• Certifications such as Microsoft, CompTIA Security+/Network+, Cisco, VMware, Sophos, Tenable, or ITIL

What We Offer

• Broad, hands‑on ownership of a modern technology stack
• Direct impact on the security posture of a cybersecurity firm
• Experienced teammates and room to improve the systems and processes behind daily operations
• Health and dental coverage, 401(k), and long‑term disability
• Paid training and certifications, and conference attendance

Additional Information

• HALOCK is an Equal Opportunity Employer committed to an inclusive environment for all employees
• Full background checks are performed, with consent, on all successful candidates before employment offers can be extended
• U.S. citizens and Green Card holders, EAD, and TN are encouraged to apply; we are unable to sponsor H‑1B candidates at this time
• No third parties, please. Only individuals need apply