Infrastructure Engineer; L5 Security Clearance

Infrastructure Engineer - Level 5 (Senior Platform Engineer)

Richardson, TX. TS/SCI. Cornerstone Defense is seeking a Principal Platform Engineer with well‑rounded Linux infrastructure engineering expertise to join an agile product team. The ideal candidate will have experience in both traditional infrastructure design, provisioning of platform, storage, and networking resources for existing on‑premise infrastructure, and in emerging Dev Ops/Dev Sec Ops  & modernized technologies. The Senior Platform Engineer will be engaged in the design and implementation of system updates and upgrades with a focus on Linux server and OS expertise, support Technical Exchange Meetings (TEMs), and provide project status as required.

The engineer will be involved with development and implementation of traditional compute, network, and storage systems, related deployments, and improving the program platform’s overarching design through new emerging technologies, including existing operating systems, server hardware designs, and modern system architectures through automation tools.

• Leverage company and industry best practices to develop and communicate implementation of infrastructure solutions.
• Maintain existing systems through Linux‑based tools and manage the COTS stack to support program needs.
• Utilize various scripting and automation tools to develop and maintain the program’s infrastructure.
• Ensure that the COTS stack and versioning are consistent across the platform; work with the team to make updates as necessary.

• Typically requires a BS/BA Degree in Science, Technology, Engineering, Math (STEM) in Computer Science, Computer Engineering, Information Technology or Physics, and 8 years of related work experience.
• Current TS/SCI security clearance is required day one; U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Hands‑on experience with Linux operating system.
• Scripting skills:
  Bash, Python, Java, Perl, Ruby, Tcl/Tk.
• Experience with markup languages: YML, XML, JSON.
• Experience with automation tools:
  Ansible, Terraform, Jenkins, Bitbucket.
• Proficiency with MS Office suite:
  Word, Excel, PowerPoint, Visio.

• Familiar with container orchestration:
  Kubernetes, Docker, Podman, Helm, Rancher.
• Familiar with Lightweight Directory Access Protocol (LDAP).
• Familiar with IT Service Management tools:
  Service Now, Atlassian (Jira, Confluence).
• Familiar with Agile project management, Scrum methodology.
• Background in Systems Operations or Engineering; supporting large complex IT environment.
• Current Poly is strongly desired for this role to obtain Privilege User access to systems.