Security Administrator

Lonestar Electric Supply•Houston, TX

just now•Onsite

About The Position

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.

Requirements

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.
Strong analytical, troubleshooting, and documentation skills.
Ability to prioritize and manage multiple initiatives in a fast-paced environment.
Excellent written and verbal communication skills.

Nice To Haves

Working knowledge of Linux and macOS operating systems preferred.
Experience with scripting (PowerShell) and automation preferred.
Familiarity with ConnectWise or similar IT service management tools a plus.
Industry certifications such as Network+, Security+, SSCP, CEH, or similar preferred.

Responsibilities

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.