Senior Site Reliability Engineer

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Founded in 1999 in the beautiful Smoky Mountains of East Tennessee, Cadre5 provides innovative technical solutions to customers locally and nationally. Our Cadre5 Lab Partners division has partnered with the National Center for Computational Sciences (NCCS) at Oak Ridge National Laboratory (ORNL) to recruit a Senior Site Reliability Engineer for the American Science Cloud (AmSC) initiative. AmSC is a first‑of‑its‑kind, federally funded cloud infrastructure and API platform designed to accelerate AI model development, data sharing, and large‑scale computational science across the U.S. Department of Energy (DOE).

ORNL is a premier research institution delivering breakthroughs in energy, national security, and advanced computing. Located near Knoxville, TN, the lab provides world‑class resources to solve some of the nation’s most complex scientific challenges. This is a rare opportunity to be part of a groundbreaking project that will help shape the future of U.S. scientific computing. If you’re passionate about cloud engineering, Dev Ops, and enabling large‑scale science, we’d love to hear from you.

Please note:

The first step in the interview process requires candidates to join a Microsoft Teams meeting with the video turned on.

• Lead ongoing improvements in reliability and scalability for our Kubernetes and Linux‑based applications and services.
• Contribute as a senior technical resource to define and implement best practices and standards for the center.
• Provide primary operational support and engineering for production applications.
• Define and implement KPIs, processes, and drive continuous improvement.
• Influence the architecture and implementation of solutions.
• Tune operating systems and applications to increase performance and reliability of services.
• Mentor junior staff and enable them for success.
• Diagnose system operational problems quickly and effectively.
• Participate in on‑call rotation providing 24‑hour, 7‑day support and off‑hours maintenance windows.
• Coordinate with vendors to resolve hardware and software problems.
• Deliver ORNL’s mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service. Promote diversity, equity, inclusion, and accessibility by fostering a respectful workplace.

• Bachelor’s Degree in computer science or a closely related field and a minimum of 8 years of experience as an SRE/Systems Engineer. An equivalent combination of education and experience may be considered.
• Ability to obtain and maintain a Department of Energy "Q" clearance may be required. This requires U.S. Citizenship.

• Excellent interpersonal and communication skills, and the ability to work as part of a team.
• Strong working knowledge of Unix system fundamentals and common network protocols.
• Experience managing Linux/UNIX operating systems in a heterogeneous environment.
• Solid understanding of networked computing environment concepts.
• Ability to develop and maintain programs and scripts that aid in the operation and automation using various shell (primarily bash) and high‑level languages (Python or Go).
• Proactive identification of performance issues, problems, and areas for improvement.
• Ability to identify requirements and define, plan, and implement requisite solutions.
• Effective planning, organization, and prioritization of tasks with minimal supervision.
• Experience with continuous integration and continuous deployment software methodologies and how they apply to SRE/systems engineering.
• Familiarity with code review and tools like Git Hub and Git Lab.
• Experience using monitoring tools such as Nagios, Grafana, and Prometheus to create dashboards.
• Experience designing and implementing highly available systems/services using virtual machines and Kubernetes resources.
• Experience participating in an open‑source community with patches accepted upstream.
• Experience deploying and maintaining automated configuration management software such as Puppet or Ansible.
• Experience implementing systems‑level security technologies like SELinux and following security best practices.

Cadre5 offers excellent pay and benefits, including full medical, dental, and vision coverage coupled with a 401(k) match, 15 days PTO, and 10 holidays.

Mid‑Senior level

Full‑time

Engineering and Information Technology

Software Development

Cadre5 is an equal opportunity employer. All qualified applicants, including individuals with disabilities and protected veterans, are encouraged to apply. Cadre5 is an E‑Verify Employer.