JAMES DEHNERT

• Deployed and supported HPC clusters at customer sites
• Deployed and administered LDAP server for cluster user authentication
• Deployed Duo for 2FA to increase cluster security
• Created, maintained, and deployed compute node and GPU node images for HPC clusters
• Created, maintained, and deployed User VMs to allow users access to HPC clusters
• Wrote shell scripts to manage deploying user VMs greatly simplifying process and providing consistency to VM creation
• Created User VMs with dedicated GPU's and 'pinned' CPUs to ensure that each user has access to specific resources at all times
• Created first terraform configuration to clone a 'golden image' to create user VMs
• Configured HPC applications for use using Environmental Modules or Conda
• Learned Penguin Solutions Scyld tools for managing HCP clusters
• Deployed and supported Penguin Solutions Scyld Cloud Workstation that allows users to access their workstations desktop through a web browser
• Wrote scripts to quickly deploy or uninstall various applications on user VMs and/or HPC nodes
• Configured HPC nodes and user VMs to use bridges and VLANs to bring all networks into their appropriate interfaces
• Deployed hundreds of user 'Virtual Machines' and 'Virtual Workstations' based on KVM virtualization.
• Resolved vulnerabilities by making improvements to network security.
• Maintained smooth operation of multi-user HPC cluster by supporting software, hardware, and networking infrastructure..
• Maintained smooth operation of multi-user computer systems through collaboration with hardware and network engineers
• Developed organization-wide administration policies to encourage continuity across multiple systems and facilities
• Planned and implemented upgrades to system hardware and software
• Devised scripts and automation tools to improve cluster efficiency

• Researched and selected software to integrate Linux authentication into Active Directory
• Re-deployed Canonical's Landscape tool after severe and fatal corruption of systems database
• Wrote several scripts for Canonical's Landscape system management tool
• Automated addition of LUKS encryption of hard drives added after the initial OS Install
• Drafted templates and coding standards for Linux scripts
• Pioneered using GitHub for version control and script retention
• Documented procedures and best practices for several un-common Linux tasks
• Wrote scripts to automatically deploy tools across over 1000 Linux workstations
• Wrote scripts to install and remove of Xerox printer configuration for Linux workstations based on building, floor, or printer name
• Helped deploy Chef as configuration management system for over 1200 Linux workstations
• Migrated Landscape scripts to Chef.
• Designed and implemented system security and data assurance
• Worked effectively in fast-paced environments
• Passionate about learning and committed to continual improvement

• Coordinated resources with varied programming expertise to create holistic solution to system update and service interruption issues
• Educated users on business interruption risk and received their buy in for system standardization and update
• Managed and Cross Trained Technical Support Team, teaching personnel Linux standards
• Deployed and automated Kickstart based configuration system for physical and virtual Linux systems
• Automated Linux system management tasks using Puppet and MCollective
• Acted as IT liaison with Enphase Energy's ASIC office in Santa Clara, California
• Acted as a personal point of contact and helped reduce 'friction' between the two groups.

• Directed system and network administrators in identifying and resolving connectivity and application accessibility issues
• Reorganized Technical Services team to improve service levels and expand career opportunities
• Developed strategic and tactical goals for corporate information systems
• Managed IT personnel and full lifecycle of information technology infrastructure, applications and services
• Designed, deployed, and managed multi-tiered web-based application servers on private cloud platforms for development and for Brandle SAAS application
• Designed and implemented virtual development environment using Vagrant and Virtual Box to give development staff resettable clustered environment for development and testing.
• Interacted directly with users to diagnose and correct major system issues and address concerns.

• Implemented inexpensive asterisk-based PBX system which resulted to communications features beyond those of more expensive systems and led to $20,000 savings
• Developed automated Kickstart process to efficiently set up and update Linux systems
• Led effort to improve support quality and customer relationships by improving support processes to better provide quality customer support and reducing task time per project.
• Designed internal process improvements to automate repetitive tasks, shortening data delivery times.

• Designed and deployed new data management process that included snapshot service for daily and weekly snapshot backups and significantly reduced time and cost for data recovery
• Installed communication links between Petaluma and San Jose, California offices which allowed greater data replication between sites and 25+ simultaneous Voice-over-Internet protocol (VoIP) telephone calls between offices and reduced costs from local toll calls
• Installed and deployed multiple Windows servers to provide Active Directory services for MS Exchange server deployment
• Adopted cost-effective, useful solutions to implement into current systems.
• Resolved issues and escalated problems with knowledgeable support and quality service

Supported several Cisco Business Units Engineering sites from the Midwest to Australia and Hong Kong (excluding Cisco's San Jose campus)

Preformed all IT functions from startup through acquisition, including serving as IT Manager, IT Director, and interim CIO.