Security Administrator

Description

Job Title: Security Administrator
Company: Lonestar Electric Supply – Corporate
Location: Houston, TX
Job Type: Full-time
EEO Class: Professionals

VETERANS ARE ENCOURAGED TO APPLY

Lonestar Electric Supply Corporate is seeking a Security Administrator to support and protect the company’s multi-location technical infrastructure. This role is responsible for designing, implementing, monitoring, and maintaining secure systems across cloud and on-prem environments serving 500+ users. The Security Administrator will play a critical role in safeguarding network resources, strengthening cybersecurity posture, and ensuring operational resilience across the organization.

This is an on-site position based in Houston, TX, within a rapidly growing and multi-state organization.

• Design, implement, and maintain security systems to protect network infrastructure, servers, endpoints, and cloud environments.
• Administer and monitor Azure cloud services, Active Directory (on-prem and Azure AD), and hybrid identity solutions including AD Connect.
• Configure and manage security controls within Meraki networking environments, firewalls, and endpoint protection platforms.
• Monitor and remediate vulnerabilities in accordance with company patch management and security policies.
• Develop and maintain security, backup, and disaster recovery strategies.
• Perform ongoing risk assessments and implement mitigation strategies to reduce exposure.
• Provide technical oversight for security-related infrastructure decisions and projects.
• Serve as a technical escalation point for complex infrastructure and security issues.
• Assist in maintaining documentation for security policies, procedures, and system configurations.
• Support compliance efforts and maintain audit readiness where applicable.
• Participate in scheduled on-call rotation and provide after-hours support as needed.
• Collaborate with IT team members to strengthen overall infrastructure reliability and security posture.
• Perform other duties as assigned by leadership.

• Bachelor’s degree in Information Technology, Cybersecurity, or related field preferred; equivalent experience considered.
• 5–10 years of experience in network security, systems administration, or infrastructure security roles.
• Proven experience managing Azure infrastructure and cloud security best practices.
• Strong knowledge of Windows Server environments and Active Directory in multi-domain environments.
• Experience configuring and managing firewalls, endpoint protection, and network security controls.
• Patch management and vulnerability remediation experience required.
• Working knowledge of Linux and macOS operating systems preferred.
• Experience with scripting (Power Shell) and automation preferred.
• Familiarity with Connect Wise or similar IT service management tools a plus.
• Industry certifications such as Network+, Security+, SSCP, CEH, or similar preferred.
• Strong analytical, troubleshooting, and documentation skills.
• Ability to prioritize and manage multiple initiatives in a fast-paced environment.
• Excellent written and verbal communication skills.

• Monday through Friday schedule.
• Participation in on-call rotation required.
• Occasional overnight domestic travel (up to 25%) may be required.

• Prolonged periods sitting at a desk and working on a computer.
• Must be able to lift up to 15 pounds at times.

• Medical, dental, life and vision insurance
• 401(k) Retirement Plan and Match
• Paid Time Off
• Specified Holiday Pay

This job description is a general outline of the day-to-day duties to be expected and may not cover all job responsibilities that may be assigned by management.