Systems & Network Engineer, Senior

Responsibilities

We are seeking a highly skilled and versatile Senior Systems & Network Engineer to join one of our clients in Mesa, Arizona. This is a hands‑on, high‑impact role supporting a complex enterprise infrastructure across virtualization, networking, storage, security, and Microsoft cloud technologies. The individual will take full ownership of the environment, serve as a key escalation point for the Director, and play a critical role in mentoring junior team members.

The ideal candidate is a proactive problem‑solver who thrives in fast‑paced environments and is passionate about driving infrastructure improvements, stability, and modernization. This is a full‑time onsite position working 4 – 10 hour days (Monday through Thursday) based in Mesa, Arizona.

• Enterprise virtualization: VMware and/or Hyper‑V
• HPE storage platforms, including Simplivity
• Cisco ecosystem:
  Meraki, UCS, Wireless APs, and Cisco ISE
• Veeam Backup & Replication for enterprise data protection
• Microsoft technologies: SQL Server, Entra  (Azure AD), Intune, Defender, and SharePoint Online
• Active Directory administration, including Group Policy management and hygiene
• Security and compliance frameworks, including NIST 800‑171 (highly preferred)

• Hands‑on experience with VMware and/or Hyper‑V
• Experience with HPE storage systems and Simplivity is preferred
• Strong Cisco networking experience (Meraki, UCS, WAPs, Cisco ISE) is required
• Experience with Veeam Backup & Replication
• Microsoft SQL Server administration, maintenance, and performance tuning
• Strong knowledge of Active Directory and Group Policy management
• Experience with Entra  (Azure AD)
• Experience with Microsoft Intune and Defender
• Experience with Microsoft Intune, Defender, and Purview—preferably within a GCC‑High environment
• Familiarity with NIST 800‑171 security controls and compliance requirements is a strong plus
• Experience supporting specialized assets / operational technology in a manufacturing environment, particularly for Department of Defense contracts, is highly desirable
• SharePoint Online administration experience
• Strong troubleshooting and problem‑solving skills
• Ability to work independently and take ownership of tasks
• CCNA certification or equivalent networking experience preferred
• Familiarity with security frameworks, compliance, or regulated environments
• Comfortable working in a direct, fast‑paced environment
• Strong, pragmatic approach with no ego‑driven behavior
• Ability to take direction and execute efficiently is critical
• Must have a car, as this position requires travel between location and the transportation of equipment
• A valid driver’s license and proof of vehicle insurance will be required
• Legally authorized to work in the US without sponsorship
• Must demonstrate a "can‑do" attitude

We offer competitive pay, medical, dental, vision, 401(k) and more.

Sentinel is a proud equal‑opportunity employer including disability and veterans. In accordance with Title VII and state regulations, all qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, marital status, pregnancy, genetics, disability, military, veteran status, or any other basis protected by law.

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