Security Engineer/Administrator

Location: Hybrid Remote/On-Site in Austin, TX

Experience Level: 5+ Years

Job Type: Full-Time

About the Role

Crux is seeking a highly skilled Security Engineer / Administrator to augment our client’s IT team. This critical role merges advanced system administration with cutting-edge security engineering expertise to deliver robust, secure, and high-performing IT infrastructure. The ideal candidate will thrive in both on-premises and cloud-based environments, proactively driving operational excellence and fortifying cybersecurity defenses against evolving threats. This position offers a unique opportunity to impact mission-critical systems, collaborate with diverse teams, and implement innovative solutions that ensure system reliability, scalability, and security.

Key Responsibilities

  • Maintain and manage on-premises and cloud-based server infrastructure (e.g., Windows, Linux, AWS, Azure).

  • Perform system upgrades, security patching, and backup operations to ensure system reliability and data integrity.

  • Manage Active Directory, group policies, and Identity Access Management (IAM) to enforce secure access controls.

  • Monitor system performance, troubleshoot issues, and optimize infrastructure for efficiency and scalability.

  • Support IT operations, including network administration, virtualization and automation (e.g., PowerShell, Bash, Ansible).

  • Undertake additional SysAdmin projects as needed, within the scope of IT operations.

  • Implement and manage security controls, including firewalls, Intrusion Detection/Prevention Systems (IDS/IPS), and endpoint protection solutions.

  • Collaborate with service providers to configure, monitor, and respond to security incidents, including log analysis and Security Information and Event Management (SIEM) tuning.

  • Review vulnerability assessment outputs and support remediation efforts to mitigate risks.

  • Develop security automation scripts (e.g., Python, PowerShell) and integrate security tools to enhance threat detection and response.

  • Work with the Managed Security Operations Center (SOC) to triage and prioritize security findings.

Qualifications

  • Education: Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, or a related field (or equivalent experience).

  • Experience:

    • 3+ years of experience in system administration, including managing on-premises and cloud-based servers.

    • 2+ years of experience in security engineering, with hands-on expertise in implementing security controls and incident response.

    • Proven experience with Active Directory, IAM tools, and group policy management.

    • Familiarity with virtualization and automation tools (e.g., Ansible, PowerShell, Bash).

    • Experience with security tools such as firewalls, IDS/IPS, SIEM platforms, and endpoint protection solutions.

  • Technical Skills:

    • Proficiency in managing Windows and Linux server environments.

    • Knowledge of cloud platforms (e.g., AWS, Azure, Google Cloud).

    • Scripting skills in Python, PowerShell, or Bash for automation and security tasks.

    • Understanding of network protocols, firewall configurations, and VPNs.

    • Familiarity with vulnerability management tools and remediation processes.

  • Certifications (Preferred):

    • CompTIA Security+, CISSP, CEH, or equivalent security certifications.

    • Microsoft Certified: Azure Administrator, AWS Certified SysOps Administrator, Okta Certifications, or similar.

  • Soft Skills:

    • Strong problem-solving and troubleshooting abilities.

    • Excellent communication and collaboration skills to work with cross-functional teams and external service providers.

    • Ability to prioritize tasks in a fast-paced environment and adapt to changing project requirements.

Additional Requirements

  • Ability to work independently and as part of a team, with a proactive approach to identifying and resolving issues.

  • Willingness to participate in on-call rotations for critical system and security incidents.

  • Must pass a background check and comply with client security policies.

Work Environment

  • Hybrid role with a combination of on-site and remote work, as determined by project needs.

  • Collaboration with Crux’s team, client IT staff, and third-party service providers, including a Managed SOC.

  • Potential for additional personnel to be assigned based on project scope expansion (subject to approval).

Why Join Us?

  • Fully remote with flexible working hours.

  • Work on diverse and impactful security projects across multiple industries.

  • Competitive salary, benefits, and professional development opportunities.

  • Join a team that values collaboration, excellence, and innovation in cybersecurity.

  • Security is fun.

Direct Applicants Only – No Staffing Agencies or Third-Party Recruiters

We are not accepting solicitations from staffing agencies, recruiting firms, or third-party vendors for this position. Any unsolicited resumes or candidate submissions from such entities will not be considered, and we will not be responsible for any associated fees.

Thank you for respecting this policy.