Systems Engineer III

NISC; Atlanta (GA); On-site; USD 120,000 - 180,000; Full time

Job summary

NISC is seeking an experienced cybersecurity/infrastructure professional to design, deploy, and maintain enterprise-grade systems across UNIX/Linux and Windows environments. The role focuses on security architectures, cloud and on‑prem infrastructure, and proactive threat monitoring, with opportunities to travel to customer sites for deployments and remediation.

Ideal candidates have hands-on experience with vulnerability assessments, endpoint protection, and multiple cloud providers, plus

Qualifications

• 6+ years of relevant experience in cybersecurity, systems administration, network engineering, or a related technical field.
• Experience installing, configuring, and troubleshooting UNIX/Linux and Windows environments.
• Experience administering and optimizing application stacks, including IIS, Tomcat, Apache, and NGINX.
• Strong networking experience, including configuring switches and SPAN/mirror ports for NDR platforms.

Responsibilities

• Analyze business challenges and lead evaluation of technology products and platforms.
• Research and design best-fit infrastructure, network, and cybersecurity architectures.
• Lead infrastructure configuration, troubleshooting, and support while ensuring quality and change-control standards.
• Support root-cause investigations of cybersecurity incidents and recommend preventive measures.
• Identify and prioritize improvements to support processes, procedures, and documentation.
• Respond to end-user and internal inquiries by troubleshooting hardware, software, and network issues.
• Ensure compliance with industry standards, regulations, and security requirements.
• Collaborate with external vendors to troubleshoot and resolve issues.
• Demonstrate initiative by contributing innovative ideas and technical solutions.
• Represent the company at conferences and industry events.
• Leverage generative AI tools to enhance productivity within the role.
• Perform other duties as assigned.

Skills

UNIX/Linux administration

Windows administration

Web servers

Networking security

Vulnerability scanning

Endpoint security

Firewalls/VPN/AD

MFA solutions

Cloud platforms

Virtualization/Containers

Monitoring tools

Automation tools

Scripting

Travel to customer sites

Education

Bachelor's Degree in Information Technology, Computer Science, or equivalent experience

Tools

OpenVAS

Nessus

Qualys

NinjaOne

Action1

CrowdStrike

SentinelOne

Job description

About NISC: NISC develops and implements enterprise-level and customer-facing software solutions for over 1,200+ energy cooperatives and communication organizations across North America. Our mission is to deliver technology solutions and services that are Member-focused, quality-driven and valued-priced. We exist to serve our Members and help them serve their communities through our innovative software products, services and outstanding customer support. We are an AI-forward company committed to being a technology leader in our industry. NISC has been ranked in ComputerWorld's Best Places to Work for 23 years, and we are looking for qualified individuals to join our team.

About NISC: NISC develops and implements enterprise-level and customer-facing software solutions for over 1,200+ energy cooperatives and communication organizations across North America. Our mission is to deliver technology solutions and services that are Member-focused, quality-driven and valued-priced. We exist to serve our Members and help them serve their communities through our innovative software products, services and outstanding customer support. We are an AI-forward company committed to being a technology leader in our industry. NISC has been ranked in ComputerWorld's Best Places to Work for 23 years, and we are looking for qualified individuals to join our team.

Job Summary

Design, develop, and maintain technical infrastructure that includes network, hardware and/or system software components. This role analyzes SOC service needs and leads the deployment and maintenance of technology solutions while designing infrastructure, network, and security architectures, guiding configuration and support of systems, assisting with cybersecurity investigations, resolving hardware, software, and network issues, and ensuring compliance with industry standards. Candidates should have proven experience across UNIX/Linux and/or Windows environments, network and security infrastructure, endpoint and firewall administration, cloud platforms, virtualization, systems monitoring, automation, and advanced scripting, along with willingness to travel to customer sites as needed.

Essential Functions

• Analyze business challenges and lead the evaluation and recommendation of technology products and platforms that meet business, technical, and budgetary requirements.
• Research and design best-fit infrastructure, network, and cybersecurity architectures.
• Lead infrastructure configuration, troubleshooting, and support while ensuring compliance with quality and change-control standards.
• Support root-cause investigations of cybersecurity incidents and recommend preventive and corrective measures.
• Identify and prioritize improvements to support processes, procedures, and documentation.
• Respond to end-user, customer, and internal team inquiries by troubleshooting and resolving hardware, software, system, and network‑connectivity issues.
• Ensure compliance with applicable industry standards, regulations, security requirements, and best practices.
• Collaborate with external vendors and service providers to troubleshoot and resolve technical issues.
• Demonstrate initiative by contributing innovative ideas, technical expertise, and creative solutions.
• Represent the company at conferences, networking events, and other industry engagements.
• Leverage generative AI tools and technologies to enhance productivity, creativity, and problem‑solving within the scope of the role.
• Perform other duties as assigned.

Knowledge, Skills, & Abilities

• 6+ years of relevant experience in cybersecurity, systems administration, network engineering, or a related technical field.
• Experience installing, configuring, and troubleshooting UNIX/Linux and Windows environments.
• Experience administering and optimizing application stacks, including IIS, Tomcat, Apache, and NGINX.
• Strong networking experience, including configuring switches and SPAN/mirror ports to provide north‑south and east‑west traffic visibility to NDR platforms such as Darktrace, Suricata, and SIEMonster.
• Experience deploying and configuring vulnerability‑scanning platforms such as OpenVAS, Nessus, and Qualys.
• Experience deploying, administering, configuring, and updating endpoint agents across enterprise environments, including RMM and EDR solutions such as NinjaOne, Action1, CrowdStrike, and SentinelOne.
• Experience configuring, administering, and troubleshooting firewalls, VLANs, firewall rules, VPN/SSL connections, and Active Directory integrations.
• Experience configuring and deploying centralized multifactor authentication solutions such as Duo, Okta, and Microsoft Entra ID.
• Experience with cloud platforms, preferably Oracle Cloud Infrastructure, AWS, or Microsoft Azure.
• Experience with virtualization and containerization technologies such as VMware, Microsoft Hyper‑V, RHEV, Nutanix AHV, Proxmox, and Docker.
• Advanced experience with monitoring platforms such as Zabbix, Nagios, and Cacti.
• Advanced experience with automation and configuration‑management tools such as Ansible, Puppet, and Chef.
• Advanced scripting skills using Windows PowerShell, Bash, Python, or similar languages.
• Ability to travel up to 25% to customer sites to support product deployments and post‑incident remediation across diverse technical environments.

License/Certification

Preferred:

• Microsoft and/or Linux systems administration certs.
• Red Hat Certified Engineer (RHCE), Microsoft Certified: Windows Server Hybrid Administrator Associate and/or AWS Solution Architect preferred

Education

• Bachelor's Degree in Information Technology, Computer Science, or equivalent experience.

Minimum Physical Requirements

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this position. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the essential functions of this position, employees must be able to see and communicate. Employees are regularly required to maintain a stationary position, move, and operate computer keyboards or office equipment.

Disclaimer

Management may modify this job description by assigning or reassigning duties and responsibilities at any time.