Senior Systems Administrator in Mesa, Arizona at Top Aces Corporation

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.

ESSENTIAL DUTIES AND RESPONSIBILITIES

• Disaster Recovery & Business Continuity
  • 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.
• Cloud & Systems Administration
  • 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.
• Helpdesk & Operational Support
  • 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.
• Enterprise Systems (ERP)
  • 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.
• Security & Compliance
  • 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.
• General Responsibilities
  • 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.

SKILLS AND/OR QUALIFICATIONS

• 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.

EDUCATION AND EXPERIENCE REQUIREMENTS

• Minimum High School diploma
• Bachelor’s degree with 6+ yeas or equivalent experience preferred.

CERTIFICATES, LICENSES, REGISTRATIONS

• 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.

PHYSICAL REQUIREMENTS AND WORKING CONDITIONS

• This position is performed in an office or remote office environment.

Disclaimer: This position requires the ability to safely and successfully perform the essential job functions as outlined in the job description. Reasonable accommodations will be provided to qualified individuals with disabilities, as required by the Americans with Disabilities Act (ADA) and other applicable federal, state, and local laws. Candidates will be expected to meet qualitative and/or quantitative productivity standards as part of the job requirements, with allowances where necessary under the ADA, FMLA, and other relevant laws.