William Crum
SpectroCloud Defense Engineer | Marine Innovation Unit Sergeant
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Sergeant William Crum is a U.S. Marine Corps Reservist and software engineer at Spectro Cloud. He serves with the Marine Innovation Unit, driving software modernization within the Marine Corps. In his civilian role, he is a Docker Captain and Senior Defense Engineer at Spectro Cloud, specializing in Kubernetes for defense and government applications.
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Your Application, Batteries Included: Packaging for Deterministic, Secure, and Portable Delivery
Delivering modern applications consistently across clouds, data centers, and disconnected networks is one of the hardest problems in the Kubernetes ecosystem. Developers and operators are often forced to choose between speed and security, convenience and control. But what if there were a way to package everything your application needs - from containers and manifests to policies, SBOMs, and configurations - into a single, verifiable artifact that just works anywhere?
In this hands-on tutorial, participants will learn how to use Zarf, an OpenSSF Sandbox Project that enables deterministic, portable software delivery. Together we’ll explore how to build a “batteries-included” application package, sign and verify its contents, and deploy it in both connected and airgapped environments. Along the way, attendees will gain insight into secure software delivery paradigms, provenance, and reproducibility all grounded in real-world, practical workflows.
Unbreakable Edge: Kairos + Zarf Deliver Immutable Kubernetes Where the Wi-Fi Ends
Meet Kairos: a lean, immutable OS that auto-installs Kubernetes with no outside help. The moment that base cluster is alive, Zarf swoops in - hauling every binary, container image, and manifest the cluster will ever need, all wrapped in signed packages you can carry in your pocket.
Need to ship an app? Sneakernet a USB stick or dribble bits over a 56-k modem; Zarf unpacks everything in-cluster. Time for an upgrade? Drop a Zarf package containing a fresh Kairos + K3s image; the System Upgrade Controller hands it off, Kairos reboots into the new OS, and the cluster rolls forward - no internet required.
In this session you’ll:
- Master offline installs from the OS to App - batteries (dependencies) included.
- Orchestrate seamless upgrades that feel so easy you’ll forget there’s no cloud.
- Secure the Mission without relying on any external services or data.
Walk away ready to run Kubernetes in air-gapped, low-bandwidth, or outright contested environments.
Securing Software Supply Chains for the Public Good
Drawing from our experiences within the public sector, we discuss software supply chain security as it pertains to public sector organizations, including the unique risks and challenges they face and how we can all work together to improve the security of the open source ecosystem.
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