Senior Systems Administrator

This is a full-time role that will be onsite 5 days per week in Lewisville, TX.

A growing organization in the aviation industry is seeking an experienced Senior Systems Administrator / IT Infrastructure Lead to serve as its senior hands-on infrastructure expert and develop into a future IT leader. This position offers a planned path toward IT management while remaining actively involved in infrastructure design, implementation, security, support, and modernization. The successful candidate will combine deep technical expertise with the communication skills, business judgment, and strategic perspective needed to take on increasing leadership responsibility.

This is an excellent opportunity for someone who enjoys solving complex technical challenges today while helping shape an organization’s long-term technology direction.

• Administer Microsoft Windows Server and Windows desktop environments.
• Manage the Microsoft 365 ecosystem, including Exchange Online, Teams, SharePoint Online, One Drive, Microsoft Entra , and Intune.
• Maintain Active Directory, Group Policy, DNS, DHCP, file and print services, and enterprise authentication.
• Administer Microsoft Azure services and contribute to cloud architecture and migration initiatives.
• Support VMware and/or Hyper‑V virtualized environments.
• Manage backup, disaster recovery, and business continuity solutions.
• Support network infrastructure, including switches, firewalls, wireless networks, VPNs, and internet connectivity.
• Evaluate practical opportunities to incorporate AI-enabled tools and solutions into business operations.

• Support a Salesforce-based ERP environment, including user administration, security, integrations, and troubleshooting.
• Maintain other business-critical applications and coordinate with department leaders to resolve issues and improve workflows.
• Evaluate and implement technologies that increase productivity, operational efficiency, and business performance.

• Lead cybersecurity initiatives involving endpoint protection, email security, vulnerability management, multifactor authentication, Conditional Access, identity protection, and data security.
• Monitor technology and security risks and recommend improvements to strengthen the organization’s security posture.
• Contribute to IT governance, policies, documentation, compliance activities, audits, and disaster recovery planning.

• Provide advanced support for Windows desktops and laptops.
• Support Apple iPhones, iPads, iOS, macOS, and related cloud services.
• Manage endpoint and mobile-device security.
• Serve as the highest technical escalation point for complex infrastructure and end-user issues.

• Leading technical projects from planning through implementation.
• Mentoring and developing junior IT team members.
• Establishing IT standards, policies, procedures, and best practices.
• Participating in technology planning, budgeting, procurement, and vendor management.
• Building productive relationships with leaders across the organization.
• Presenting technology recommendations to senior and executive leadership.
• Identifying opportunities to improve business processes through technology.
• Helping develop the organization’s infrastructure, cybersecurity, and technology roadmaps.

• At least 10 years of progressively responsible IT experience supporting business or enterprise environments.
• Advanced expertise in Microsoft Windows Server and Windows desktop administration.
• Extensive Microsoft 365 administration experience, including Exchange Online, Teams, SharePoint Online, One Drive, Microsoft Entra , and Intune.
• Strong Active Directory, Group Policy, DNS, and DHCP administration experience.
• Experience administering Microsoft Azure cloud services.
• Experience supporting VMware and/or Hyper‑V environments.
• Experience administering or supporting…