Systems Engineer III

Job Summary Our client is seeking a Systems Engineer III to join their team. This position is located in Denver, Colorado. The role serves as a subject matter expert in DNS within a high‑velocity lab environment, responsible for the ownership, maintenance, and technical evolution of DNS infrastructure to ensure agility and stability for complex research and development. Responsibilities Own and manage lab DNS/DHCP/IPAM (DDI) services, including configuration, proactive monitoring, and high‑tier troubleshooting. Architect and implement automated DNS workflows using Terraform, Ansible, or Python to support episodic lab deployments and CI/CD pipelines. Manage IP address space allocation (IPAM) across disparate lab segments to prevent overlaps and ensure accurate resource tracking. Integrate DNS resolution across hybrid‑cloud environments, ensuring seamless connectivity between on‑premises hardware and public cloud instances. Support network‑level services such as PXE boot, DHCP Relay, and SRV record management for specialized lab equipment and application testing. Configure and maintain DNS security features, including DNSSEC and Response Policy Zones (RPZ), to support security research and hardened test environments. Perform deep‑packet analysis using tools like Wireshark or tcpdump to resolve complex resolution issues within non‑standard network topologies. Lead DNS‑related infrastructure projects, from initial capacity planning to decommissioning of legacy lab systems. Collaborate with cross‑functional teams to provide customized DNS solutions for high‑performance computing and low‑latency application testing. Drive the adoption of infrastructure‑as‑code (IaC) best practices to ensure repeatable and version‑controlled DNS configurations. Provide technical guidance and mentorship to junior engineers regarding DNS protocols and systems administration. Qualifications 4+ years of hands‑on experience managing and maintaining enterprise or lab‑grade DNS environments. Strong mastery of DNS architecture, recursive versus authoritative resolution, and protocol‑level operations. Experience with DDI platforms such as Infoblox, BlueCat, or BIND/ISC DHCP. Proficiency in Linux/Unix systems administration and shell scripting for task automation. Familiarity with virtualization and container platforms (VMware, OpenStack, Kubernetes) and their DNS requirements. Proven ability to manage complex projects in a fast‑paced, experimental environment. Strong collaboration skills with the ability to translate research needs into technical system requirements. Excellent problem‑solving skills, focused on root‑cause analysis in multi‑vendor environments. Benefits Medical, Dental & Vision Insurance Plans. Employee‑Owned Profit Sharing (ESOP). 401(k) offered. Approximate pay range: $42.00 to $52.00 per hour. #J-18808-Ljbffr KellyMitchell Group