Systems Security Administrator

Description

We are looking for a Systems Security Administrator to support and strengthen enterprise security operations for an organization in Houston, Texas. This Long-term Contract position is ideal for a detail-oriented individual who can monitor threats, respond decisively to incidents, and help maintain a secure Microsoft-based environment. The role will work across security tools, vulnerability management processes, and infrastructure protection efforts while collaborating closely with technical teams to reduce risk and improve response readiness.

Responsibilities:

Monitor security platforms across the Microsoft ecosystem, including O365 E5 security solutions and endpoint protection tools, to identify and address potential threats quickly.

Investigate alerts, analyze suspicious activity, and take appropriate containment and remediation steps to minimize operational and security impact.

Administer and optimize SIEM and endpoint security technologies to improve detection accuracy, response efficiency, and overall platform performance.

Manage vulnerability assessment tools such as Rapid7 or Tenable, including configuration tuning, reporting, and coordination of remediation priorities.

Partner with internal teams to support patching efforts and help resolve challenges that affect vulnerability reduction and security compliance.

Conduct proactive threat hunting and review intrusion detection and prevention data to uncover indicators of compromise or abnormal behavior.

Install, maintain, and update security applications and controls to ensure continued effectiveness across the environment.

Apply and support security policies, standards, and architecture practices across Windows systems, networking components, and firewall-related controls.

Provide support during security events outside standard business hours when urgent incident response is required.

Contribute to secure development and operational practices by collaborating with teams that use DevSecOps-related tools such as GitHub and similar platforms.

Requirements

2-3 years of hands-on experience working with Microsoft security technologies, including O365 E5 security products, Microsoft Defender, or comparable endpoint protection platforms.
2-3 years of experience using vulnerability management solutions such as Rapid7 or Tenable, with the ability to administer and fine-tune the tools.
Practical experience with SIEM tools, intrusion detection systems, or intrusion prevention technologies in a production environment.
Solid understanding of Windows environments, core networking concepts, firewall principles, and enterprise security architecture.
Proven ability to assess security incidents, investigate suspicious behavior, and support timely remediation activities.
Strong communication skills with the ability to work effectively across technical teams on patching, risk reduction, and issue resolution.
Experience deploying security software, maintaining security controls, and supporting the enforcement of security policies.
Exposure to DevSecOps practices and tools, including platforms such as GitHub, is considered an advantage.

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