Senior Systems Administrator

Top Aces Corporation • Mesa, AZ

8d • Hybrid

About The Position

The Senior Systems Administrator is a hands-on, technical role responsible for supporting and advancing the organization’s IT infrastructure across cloud, on-premises, and enterprise application environments. This position blends advanced systems administration, cloud solutioning, and operational support with a strong emphasis on disaster recovery readiness and enterprise system reliability. The Senior Systems Administrator requires a proactive, solutions-oriented professional capable of balancing strategic cloud initiatives with day-to-day ticket support and operational responsibilities. The ideal candidate demonstrates deep technical expertise, strong troubleshooting skills, and the ability to continuously learn and adapt across a broad technology stack, including operating systems, networking, and enterprise platforms. The information below is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required for this position.

Requirements

• Strong organizational skills and attention to detail.
• Ability to manage multiple priorities in a fast-paced environment.
• Ability to handle sensitive information with discretion.
• Ability to work independently and within a team while demonstrating sound judgement and attention to detail.
• Must be able to work under pressure and meet deadlines while fostering a positive attitude.
• Must have strong problem-solving abilities.
• Proficient in the English language with excellent verbal and written communication skills.
• Must be proficient in the Microsoft Office Suite.
• Must demonstrate safe and healthy workplace practices.
• Must be able to work nights, weekends, and holidays as needed.
• Must be able to travel within the US and internationally.
• Must demonstrate the knowledge, skills, and abilities of a Senior Systems Administrator in daily work performance.
• Must be able to obtain a Common Access Card (CAC) and not be barred from any installation.
• Must be able to obtain and maintain a security clearance.

Nice To Haves

• Microsoft Certified: Azure Administrator Associate or equivalent preferred.
• Networking certification: Cisco Certified Network Associate (CCNS) or equivalent preferred.
• CompTIA Security+ preferred.
• Additional certifications (e.g., Azure Solutions Architect, CISSP) are a plus.

Responsibilities

• Oversee and validate enterprise backup solutions across on-premises and cloud environments.
• Perform regular backup testing, restoration drills, and disaster recovery exercises.
• Ensure Recovery Time Objectives (RTO) and Recovery Point Objectives (RPO) are defined and met.
• Maintain and improve disaster recovery documentation and runbooks.
• Identify gaps in resiliency and implement improvements to strengthen business continuity posture.
• Design, implement, and support cloud-based solutions (primarily Microsoft Azure and Microsoft 365 environments).
• Manage identity services including Active Directory and Microsoft Entra ID (SSO, MFA, conditional access).
• Administer endpoint management platforms (e.g., Intune) and system configurations.
• Maintain Windows Server, virtualization platforms, storage systems, and networking components.
• Monitor system performance, availability, and security across hybrid environments.
• Support automation and optimization of infrastructure through scripting and tooling.
• Provide Tier 2 and Tier 3 escalation support for complex technical issues.
• Troubleshoot hardware, software, network, and cloud-related issues.
• Support onboarding and offboarding of users, devices, and access controls.
• Ensure timely resolution and documentation of tickets while maintaining high service levels.
• Mentor junior-mid IT staff and contribute to improving helpdesk processes.
• Learn, support, and assist in administration of the Enterprise Resource Planning (ERP) system.
• Collaborate with business stakeholders to troubleshoot ERP-related issues.
• Support integrations between ERP and other enterprise systems.
• Assist in upgrades, patches, and performance optimization of ERP environments.
• Document workflows, configurations, and system dependencies.
• Support adherence to security frameworks such as NIST 800-53, NIST 800-171, and CMMC Level 2.
• Assist with vulnerability management, patching, and system hardening.
• Participate in audits and ensure systems meet compliance and security requirements.
• Maintain secure configurations across all managed systems.
• Maintain accurate system documentation and configuration records.
• Assist with evaluation and implementation of new technologies.
• Support IT projects and strategic initiatives as assigned.
• Ensure reliability, performance, and scalability of IT systems.
• Perform other duties as assigned.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Associate degree