Senior IT Systems Engineer

N4 Solutions, LLC offers our public and private sector clients the collective intellectual knowledge, expertise, and experience of our company and associates to help our customers evaluate, collaborate, innovate, and create business, technology, and scientific solutions that enable them to accomplish their mission and achieve organizational objectives. With the growth of the company, we are seeking a highly motivated and hard-working system administration professional to join our team.

The successful candidate will work in a high-paced and rewarding work environment.

The Senior IT Systems Engineer is responsible for the design, implementation, maintenance, and continuous improvement of enterprise IT systems and infrastructure. This role operates with minimal supervision and requires strong expertise in systems engineering, cloud and on-premises environments, and federal compliance frameworks. The engineer ensures system reliability, security, and performance while supporting organizational objectives and aligning with NIST, FISMA, and cybersecurity directives.

• Perform systems engineering, integration, and maintenance activities in accordance with established standards and best practices.
• Administer and support on-premises and cloud-based environments, including Microsoft 365 and Azure.
• Install, configure, test, and maintain servers, storage systems, and networking equipment.
• Conduct day-to-day systems administration to ensure availability, performance, and reliability of IT services.

• Evaluate existing IT systems architecture and configurations; provide well-researched, documented recommendations for improvements.
• Identify system dependencies and provide guidance to System Owners on operational priorities.
• Participate in project planning and integration efforts to ensure alignment with enterprise IT operations.

• Apply expertise in LAN, wireless, and cloud networking technologies to implement and troubleshoot solutions.
• Maintain and optimize connectivity, performance, and resilience across infrastructure components.

• Manage the Microsoft Entra  (Azure AD) environment, including:
  • Conditional access policies
  • Multi-factor authentication (MFA)
  • Identity auditing and monitoring
• Ensure secure identity and access controls aligned with organizational policies.

• Apply knowledge of NIST guidelines, FISMA requirements, and federal directives to systems management.
• Identify gaps in FISMA compliance and develop actionable remediation plans.
• Implement and maintain STIG baseline configurations for servers and systems.
• Support security initiatives such as:
  • Endpoint Detection and Response (EDR) policies
  • SCuBA compliance baselines
• Maintain system hardening, vulnerability mitigation, and configuration hygiene.

• Develop and execute patch management strategies to ensure systems are up to date and secure.
• Install firmware updates and security patches across servers, printers, and network devices.
• Protect data through secure configuration and adherence to established procedures.

• Configure proactive system monitoring and alerting for critical IT resources.
• Support detection of performance issues, vulnerabilities, and potential security incidents.

• Dev
  elop and support disaster recovery (DR) strategies for critical systems and data.
• Ensure backup, recovery, and continuity capabilities meet organizational requirements.

• Develop and maintain comprehensive systems operations documentation, including:
  • Standard Operating Procedures (SOPs)

• Maintenance and support processes
• Ensure documentation supports repeatable, auditable, and compliant operations.

• Bachelor's degree in Information Technology, Systems Engineering, or related field (or equivalent experience).
• 6+ years of experience in systems engineering, administration, or infrastructure support.
• Strong knowledge of:
  • NIST frameworks and FISMA…