Currently building out an OpenStack cluster installation. Tech environment includes MAAS, Juju, Charms, Ubuntu, Python, scripting.

- Developed platform and infrastructure features for embedded system in aircraft/marine satellite communication, including iptables-based firewalls.- Built a new system to repeatably generate specialized Ubuntu-based virtual images used in the product.- Refactored other build processes and systems to move the organization toward fully repeatable product builds and addressing long-standing technical debt.- Acted as a consultant for the other team members on issues with Linux OS and networking.Key tech: Python, Bash/shell, KVM/qemu, TCP/IP networking, Linux network namespaces, iptables, Jenkins, Ubuntu, systemd, Docker, runc, Debian packaging, git

During the pandemic I took time away from corporate IT work to pursue personal projects and interests including development of a grow operation for vegetables and culinary herbs on my acreage in rural Skagit County, WA.

Kernel and OS Team- Developed features, performed software maintenance, and performed problem analysis for OCI system software running on SmartNICs.- Performed feasibility work on a proposed ARM-based SmartNIC, determining that Oracle Linux could be successfully adapted to run on the device.- Provided expert advice consulting on technical issues with colleagues, assisted with development and debugging issues.Key tech: C, C++, Python, TCP/IP networking, Marvell ThunderX (ARM), Oracle Linux, KVM, qemu, Docker, Vagrant, Chef, gitVirtual Private Cloud Team- Developed features, performed software maintenance, and performed problem analysis for OCI system software running on SmartNICs.- Performed feasibility work on a proposed ARM-based SmartNIC, determining that Oracle Linux could be successfully adapted to run on the device.- Consulted on technical issues for colleagues.Key tech: C, C++, Python, TCP/IP networking, Marvell ThunderX (ARM), Oracle Linux, KVM, qemu, Docker, Vagrant, git

AWS Key Management Service Team- Designer and core developer for security appliance in the AWS KMS stack. - Designed and built the facility to launch system images on the appliance instances.- Performed technical and operational planning, consulting, and contribution to the overall KMS service infrastructure.- Collaborated with security engineers evaluating security factors for the appliance, readying it for FIPS 140-2 level 2 certification.- Influenced architectural decisions based on knowledge of the appliance hardware, security constraints, and next generation appliance planning.Key Tech: C, C++, Java, TCP/IP networking, AWS S3, AWS DynamoDB, TPM, Linux kernel, RPM packagingAWS Directory Service Team- Led the development team for AWS Directory Service, taking it from proposal to full public beta.- Established team development environment and practices, deployment, operational practices.- Performed research/feasibility determination of service components and facilities, prototypes.- Designed and led development work on service control plane framework: service interfaces, persistence, workflow, system agents, configuration facilities, operational support facilities.- Mentored junior engineers.Key Tech: C, Java, Samba, AWS EC2, AWS Simple Workflow Framework, AWS DynamoDB, git

Professional Engineering Services Team- Developed system software for an ARM and OpenStack-based project, including an extension of U-boot functionality.- Performed technical feasibility studies for sales and marketing, vetting aspects of proposed product designs.Key Tech: C, Python, Ubuntu Linux, OpenStack, ARM, qemu, u-boot, git

Kernel and OS Team- Linux kernel sustaining work and systems engineering, problem analysis/resolution, qualification work for Linux kernel and Xen virtualization.- Created proof-of-concept for live migration of Xen-based virtual machines.Key Tech: Linux kernel, Xen Virtualization, virtual TCP/IP networking, DRBD, C, Bash/shellEC2 Network Security Team- Wrote Linux network kernel components of the Virtual Private Cloud (VPC) for EC2- Performed feasibility studies and data plane enablement for Windows on EC2- Developed new features and functionality for the EC2 cloud control plane software.- Resolved critical EC2 operational issues, ensuring smooth functionality and minimizing downtime for users.Key Tech: Linux kernel networking, Xen virtualization, para-virtualization, TCP/IP, C, Bash/shell, RubyE-Commerce Service Team- Designed and developed extension to surface special offers from the Amazon website through ECS.- Designed and led development of service to expose Amazon website preferences and suggestions as a general-use AWS service.Key Tech: SOAP, XML, Perl, Java, Apache, TomcatTransaction Product Platform Development Team- Analyzed software defects and developed fixes (sustaining engineering) for Amazon Commercial Website subsystemsKey Tech: XML, SOAP, Mason, SQL, Oracle, HTML, CSS

- Sustaining software engineer for FTX (Fault-tolerant SYSV variant) and Stratus HP-UX (Stratus-branded HP-UX), on Stratus fault-tolerant minicomputers. - Provided tier 3 tech support for customer technical staff- Developed post-release OS fixes for FTX- Back-ported features from newer OS versions to targeted older versions- Mentored and supported tier 1 and tier 2 tech support personnel

Developed GUI instrumentation (X11 on SCO UNIX) to replace physical meters, plotters, etc. for drilling systems control for oil and gas wells.