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Caleb Kingsbury

@calebkingsbury

Platform Engineer at N3bula Systems building Kubernetes infrastructure and automating platform provisioning with Puppet.

United States

Message

What I'm looking for

I’m seeking flexible remote opportunities, including contract work, part-time positions, weekend shifts, or asynchronous project-based work while pursuing advanced education.

At N3bula Systems, I build and deploy platform infrastructure from bare metal to production. I implement Kubernetes clusters, integrate Keycloak, and manage Rancher and Harbor.

At Two Six Technologies, I architected classified low-side and high-side environments, deployed infrastructure, and automated provisioning workflows with Ansible. I also maintained Proxmox clusters and implemented backup solutions.

Earlier, at Institute for Defense Analyses (IDA), I led a RHEL 6 to RHEL 8 upgrade project and created offline repositories for air-gapped networks. I’m seeking flexible remote opportunities, including contract, part-time, weekend, or asynchronous project-based work while pursuing advanced education.

Experience

Work history, roles, and key accomplishments

Current

Platform Engineer

Current

N3bula Systems

Aug 2024 - Present (2 years 3 months)

Build and deploy comprehensive platform infrastructure from bare metal to production. Architect and implement Kubernetes clusters, integrate Keycloak, and manage Rancher and Harbor for container orchestration.

Kubernetes Docker Rancher Harbor Keycloak Puppet Automation Monitoring

Systems Engineer

Two Six Technologies

Jun 2023 - Jul 2024 (1 year 1 month)

Architected and deployed classified low-side and high-side environments. Performed full infrastructure buildout including racking servers, networking, and application deployment.

Ansible Proxmox Gitlab Mattermost IPA Backup Solutions Automation

System Administrator II

Institute for Defense Analyses

Apr 2022 - Jun 2023 (1 year 2 months)

Customized Python installation scripts for RHEL environments and managed offline repositories for air-gapped networks. Led RHEL 6 to RHEL 8 upgrade project across production infrastructure.

Python RHEL LDAP Active Directory Local Package Repositories Tier 3 Support

Senior Linux Engineer / Server Engineer

WBB/SERCO-NA

Feb 2021 - Apr 2022 (1 year 2 months)

Delivered infrastructure support for software development teams. Automated routine administrative tasks using Bash scripting, improving team efficiency by 40%.

BASH Linux Containerization Patching Security Compliance

Linux System Administrator

SCCI

May 2020 - Feb 2021 (9 months)

Managed Kickstart-based automated deployment of RHEL7 systems. Conducted vulnerability assessments and system hardening using SCAP and Nessus.

Kickstarts RHEL 7 SCAP Nessus Security Scripting

Special Operations Cyber Non-Commissioned Officer

1st Special Forces Group (Airborne)

Jun 2018 - Feb 2020 (1 year 8 months)

Rebuilt tactical network architecture enhancing operational effectiveness during deployments. Designed and deployed communication servers using CentOS in austere environments.

CentOS Network Architecture Cyber Operations Training

Tactical Local Area Network Administrator

1st Special Forces Group (Airborne)

Feb 2016 - Jun 2018 (2 years 4 months)

Configured Cisco switches with Layer 3 routing and VLAN segmentation. Provided remote technical support to geographically dispersed teams.

Cisco Layer 3 VLAN Windows Server VMWare Network Security

Information Technology Specialist / Information Management Officer

160th Special Operations Aviation Regiment (Airborne)

Feb 2013 - Feb 2016 (3 years)

Managed network operations supporting 300+ users across multiple aviation units. Deployed and maintained LAN/WAN infrastructure for mission-critical systems.

Network Operations LAN WAN Hardware Support Security Controls High Availability