System Administrator

Innovative Signal Analysis (ISA) is seeking new engineering talent. ISA works in all phases from concept design, through development and integration, to operations and maintenance of challenging mission critical systems, with offices in Richardson, TX & Aurora, CO.

• Junior System Administrator: Performs routine administration and troubleshooting with guidance, follows documented procedures, and demonstrates a strong willingness to learn.
• System Administrator: Independently supports production systems, resolves complex issues, contributes automation, and participates in infrastructure projects.
• Senior System Administrator: Designs and improves infrastructure solutions, leads complex projects and troubleshooting efforts, develops standards, and mentors other team members.

• Administer, secure, maintain, and troubleshoot Windows and Linux servers, workstations, applications, and supporting infrastructure.
• Support Windows 11, Windows Server 2022, Red Hat Enterprise Linux 8/9, Microsoft 365, Active Directory, Group Policy, DNS, DHCP, Exchange, WSUS, and certificate services.
• Perform system provisioning, patching, upgrades, vulnerability remediation, configuration changes, backups, and lifecycle maintenance.
• Monitor system health, performance, capacity, availability, and security events.
• Support users and engineering teams through helpdesk, ticketing, incident response, and root-cause analysis processes.
• Participate in infrastructure projects and, depending on experience, lead technical planning and implementation.
• Create and maintain system documentation, diagrams, procedures, build guides, and troubleshooting records.
• Collaborate with coworkers, users, vendors, and leadership across Colorado and Texas.

• Systems administration: Hands‑on experience supporting Windows and Linux operating systems, services, users, permissions, patching, and troubleshooting.
• Core infrastructure: Working knowledge of Active Directory, Group Policy, DNS, DHCP, identity management, access control, certificates, PKI, and TLS.
• Networking
  :
  Understanding of TCP/IP, VLANs, routing, firewalls, ports, protocols, and connectivity troubleshooting.
• Virtualization and storage: Familiarity with enterprise hypervisors, virtual machines, NFS, SMB/CIFS, snapshots, replication, backups, and recovery concepts.
• Provisioning and automation: Experience with Kickstart, Windows unattended installation, Bash and/or Power Shell scripting, and Git version control.
• Security and compliance: Understanding of system hardening, vulnerability remediation, security best practices, and DISA STIGs.
• Support and communication: Experience with help‑desk or customer‑support processes, ticketing systems, documentation, and communicating technical work clearly.

• Automation and Infrastructure as Code: Ansible, Terraform, Packer, standardized configuration management, and automated system deployment.
• Dev Ops and software delivery: Git Lab, CI/CD pipelines, Nexus artifact repositories, and infrastructure testing or validation.
• Containers and orchestration: Podman, containerized services, Kubernetes, RKE2, K3s, and CSI storage integrations such as Trident.
• Enterprise networking: Cisco Catalyst or Nexus switching, Palo Alto firewalls, Cisco VoIP, and data‑center network infrastructure.
• Storage and backup: Net App, Synology, Pure Storage, Veeam, snapshots, replication, and recovery testing.
• Monitoring and security: Grafana, Prometheus, Solar Winds, Elastic Stack, Splunk, Nessus, Trellix, and vulnerability‑management tools.
• Compliance: DISA STIG implementation, SCAP scanning, CMMC requirements, system hardening, and remediation across operating systems and infrastructure appliances.
• Projects and leadership: Planning or leading…