Systems Engineer Production
Resume:
DAMON
HENTHORNE
************@*****.***
**** ****** ***, ***** ******* Park CA
SUMMARY
Highly experienced IT professional with over 28 years of expertise in Unix-related administration, development, design, and deployment of production systems. Proven ability to provide scalable, secure, and highly available solutions with robust disaster recovery capabilities. Skilled in ensuring optimal system performance and reliability to support critical business operations.
SKILLS
Technical skills
AWS EC2
DNS Management
Network Design
Virtualization (VMware)
User Account Administration
Backup Solutions (HPUX, Linux
Soft skills
Microsoft Azure
Adaptability
Problem-Solving
Communication
Team Collaboration
Project Management
Advanced Systems Engineer 04/2019 to 06/2024
EXPERIENCE
WAYSTAR
Managed and supported datacenter-hosted production systems, ensuring stability and optimal performance.
Developed and maintained automation scripts using Bash for various administrative tasks.
Installed and configured XenServer clustered solutions to enhance system availability and scalability.
Installed and configured Kubernetes clusters to support development environments.
Managed and migrated Kemp load balancers to new appliances, ensuring seamless configuration and performance.
Installed and configured a PRTG failover cluster with remote probes across three datacenters to ensure reliable network monitoring.
Provided maintenance and support for Nimble storage systems, ensuring data integrity and availability.
Offered comprehensive hardware support for Dell servers, HP ProLiant servers, and EMC and Nimble storage devices.
Managed Red Hat Satellite repository, mirror, and server support, ensuring efficient software distribution and system updates.
Developed and maintained lifecycle environments for efficient system management.
Built and managed new content views for patching, ensuring proper promotion to relevant activation keys.
Refreshed subscription-manager and YUM on Linux hosts to maintain up-to-date system configurations.
Implemented a pull-based patching system from attached hosts, rather than pushing from Satellite, to enhance control and efficiency.
Configured and ensured appropriate sync schedules for repositories, maintaining system consistency and reliability.
Vertica production database cluster support and configuration
Supported EOL systems (CentOS6)
Replaced EOL OS with RHEL7.9
Backed up old operating systems while preserving the /Data partition during the installation of new supported OS. Utilized remote hands and a 2TB USB drive for data transfer between systems. Installed new OS using remote media via DELL iDRAC.
Ensured passwordless public key authentication between all hosts within the cluster to facilitate seamless communication and operations.
Provided comprehensive troubleshooting and support for both cluster configurations and operating systems, ensuring optimal performance and reliability.
VMware vm builds/support
Built multiple RabbitMQ clusters
Built out an in place upgrade from RHEL7.9 to 8.6 using Satellite and LEAPP tools.
Built out multiple Kurbenetes hosts(both physical and virtual.
Built out virtual Vertica DEV and QA clusters.
• Dell and HP server support.
Support hardware via iDRAC and iLO
Worked with support vendors for hardware support, Dell, HP, SEI.
• General Windows support and AD user support.
Extensive RHEL 7/8/9 experience both physical and virtual.
Postfix expertise and configuring tls implementations.
SSSD experience for AD authentication on Linux(Red Hat)
NETWORK ENGINEER 01/2009 to 01/2019
Edgewave
AWS EC2 & Microsoft Azure Deployed and managed cloud resources, including creating AMIs for quick deployment and handling PostgreSQL backend on Azure.
Ansible for AWS EC2 VM configuration.
Email & Virus Filtering Provided both appliance-based and hosted solutions for email and virus filtering.
Linux Systems Support Supported CentOS, OpenSUSE, and custom Linux From Scratch (LFS) systems.
Automation & Scripting Developed and utilized Bash and Perl scripts to automate administrative tasks.
Monitoring & Custom Solutions Configured Nagios for system monitoring and developed custom plugins to enhance visibility.
Advanced Support Delivered Tier 3 support for complex Java applications, participated in on-call rotations for 24/7 system support.
DNS & Network Management Administered Bind and PowerDNS for domain name resolution, designed and maintained network infrastructure.
Hardware & Firmware Support Troubleshot Dell hardware and firmware issues.
Web & Database Administration Managed Apache web server configurations, administered PostgreSQL databases ensuring performance and integrity.
VPN & VOIP Systems Provided support for OpenVPN implementations and Shoretel VOIP systems.
Router & Load Balancer Configuration Configured and maintained Juniper routers and Kemp load balancers.
Virtualization & Backup Solutions Implemented and supported VMware virtual environments and Revinetix/Eversync backup appliances.
Email Integration & Firewall Support Configured Postfix with PostgreSQL for MS Office365 integration and supported IPCOP firewall and VPN configurations.
Data Center Operations Supported and maintained operations at East and West coast Equinix datacenters
JUNIOR ORACLE DBA/SENIOR UNIX SYSTEMS ADMINISTRATOR 01/2002 to 01/2009
Hobsons - Santa Rosa, CA
Delivered web services for online college applications and contact management systems.
Developed scripts using Perl, Bash, Ant, and Python to automate various administrative tasks.
Managed Linux servers including RHEL 5.X, SLES 9/10, OpenSUSE 10.X, Solaris 8/9/10, CentOS, HPUX, Debian, and BSD.
Administered Solaris/Oracle 9i standard server implementations.
Managed DNS using Bind for domain name resolution.
Designed and implemented Tomcat clustered servers behind Alteon AD3 Load Balancer and Alteon ISD SSL accelerator using Apache as the web front end.
Replaced Alteon load balancers, SSL accelerators, and Apache web server with F5 LTM appliances.
Designed and implemented a Source Code Management (SCM) solution using Ant, automating client database creation, configuration generation, and deployment of test and production web applications.
Attended Oracle 10g Administration Workshops 1 and 2.
Designed and implemented a production email system using Port25 Power MTA gateway with a Courier/Maildrop/Spamassassin backend, processing approximately 20 million emails per month.
Provided support for account managers and development teams for client issues.
Developed custom automated GPG encryption/decryption solutions for clients with specific security requirements.
Managed SSL certificate/key support using Verisign and GoDaddy for secure web applications.
Provided Oracle 10g support including maintenance of failover and disaster recovery systems using DBVisit.
Implemented and supported Veritas NetBackup server, including Oracle 10g RMAN agent client installations.
Implemented complex virtual production environments using Virtual Iron.
Administered iSCSI on Linux using EMC SAN and OpenFiler.
Worked with collocation facilities such as Sonic, Saavis, and Level3.
Managed IPSEC firewalls, security protocols, and VPN technologies.
Configured and managed system monitoring using Nagios and Zenoss, including custom SNMP and Nagios plugin scripting.
SOFTWARE ENGINEER /IT SYSTEMS ADMINISTRATOR 08/1999 to 10/2002
Com Dev - San Luis Obispo, CA
Duties as Software Engineer
C/C++ Development Developed software for a 1xEVDO wireless data overlay system using C and C++.
Access point controller software/firmware.
Hand off testing software.
Detailed explanations of the software projects can be provided upon request via phone or in person.
Duties as Systems Administrator
Managed Linux and Windows systems, overseeing network and phone systems design and implementation, as well as email and DNS administration.
Converted qmail email systems to accommodate a new company name.
Administered and maintained DNS systems for reliable domain name resolution.
Managed and upgraded the Concurrent Versions System (CVS) for version control.
Designed and implemented network and phone systems for a new building, collaborating with contractors on network/phone wiring and power requirements.
Implemented and managed the phone system, ensuring seamless communication.
Designed and implemented SAMBA storage solutions for multi-platform networks, enhancing data sharing capabilities.
Created Bash scripts for automated backups using dump.
Provided comprehensive support for Windows and Linux workstations as well as phone systems, ensuring operational efficiency and reliability.
Administered may linux variants, Red Hat Linux and Debian systems.
UNIX ADMINISTRATOR 01/1997 to 08/1999
CDM Technologies - San Luis Obispo, CA
While attending Cal Poly San Luis Obispo I worked as a Unix administrator on HPUX and Linux systems. Basic Windows administration as well as network duties
Successfully implemented a new DNS system to enhance network performance and reliability.
Installed and configured the network in a new building, including wiring, DSL setup, and switch installation.
Administered HPUX systems for backups and email, ensuring data integrity and communication efficiency.
Built and configured Linux workstations to meet organizational requirements.
Managed and administered Linux, Windows, and Solaris workstations, ensuring smooth operation and user support.
Diagnosed and resolved network issues to maintain seamless connectivity.
Performed user account administration, including account creation, modification, and deletion.
Installed and administered a Nortel phone system, providing reliable telecommunication services.
EDUCATION AND TRAINING
California Polytechnic State University - San Luis Obispo CA
Bachelor of Science
Computer Engineering, 05/1999
Santa Rosa Junior College - Santa Rosa CA
Associate of Science
Engineering, 05/1995
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