| Experience |
Essent Guaranty
Senior Systems Engineer |
Winston-Salem, NC
December 2009 to Present |
In charge of development, installation, maintenance, and troubleshooting of a wide range of hardware, software, and services. Provide support and direction for unix, Oracle, and network engineers. Continue to service Triad Guaranty servers, services and personnel. Designed and built: site-to-site VPNs with redundant pathing; multi-tiered clustered firewalls with protected DMZs; VI3/vSphere farms for VDI and production/test/dev service environments; clustered DNS, DHCP, and other infrastructure services; web, proxy, edi, samba, secure file transfer and other specialized services. Managed EMC storage and Brocade SAN fabric. Assisted with installation/testing of Riverbed Steelhead WAN optimizers. Programming languages: python, sh, bash, ksh, perl. Services: dns, nfs, samba, rsync, ssh/scp/sftp, ftp/ftps, http/https, snmp. Specialized software: VMWare ESX/vSphere/vCenter, ESXpress, Legato Networker, apache, squid, pfsense, pf, mysql, djbdns, etc. Systems proficient with: Sun Solaris 10, BSD (FreeBSD, OpenBSD), Linux (SuSE/RedHat/Debian/Ubuntu/Gentoo), Mac OS X. Systems familiar with: AIX, HPUX, Microsoft Windows Server. |
Triad Guaranty
Senior Systems Engineer, Unix Systems |
Winston-Salem, NC
December 2004 to December 2009
IT Infrastructure purchased by Essent Guaranty
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In charge of development, installation, maintenance, and troubleshooting of a wide range of hardware, software, and services. Managed two unix admins, and provided support and direction for Oracle admins. Migrated all unix services from HPUX on PA-Risc hardware to Linux, BSD, and Sun Solaris on Intel x86 hardware, and administered 80+ servers. Replaced expensive Radware/Checkpoint combination with open-source-based clustered firewall solution, achieving better performance and higher reliability while lowering ongoing maintenance costs. Architected and implemented a 3-tier dns cache to improve company-wide network performance, and replaced all bind instances with much faster and more secure djbdns. Segmented the corporate network to provide higher performance for production services, and increased security by implementing a DMZ for internet-facing hosts. Implemented an intrusion detection system utilizing snort, syslog, mysql, BASE, and a custom log parser. Architected and implemented a VMware Virtual Infrastructure farm consisting of three distinct clusters, handling everything from web, edi, and file sharing to large application suites such as EMC Documentum. Implemented encrypted backup solution that drastically reduced time and effort required for disaster recovery. Implemented site-to-site vpn using Cisco and OpenBSD systems. Implemented a wiki to promote creation and sharing of documentation. Developed python-based parallel-processing framework for EDI. Assisted with complete SAN overhaul, migrating from Falconstor and XIOtech/JMR to EMC Clariion and Centera. Assisted in moving Oracle to multi-node RAC (clustered) environment. Assisted with installation/configuration of Zabbix and Solarwinds for system health monitoring. Provided assistance and recommendations to networking/telecom and security teams. Generated copious amounts of technical documentation. |
DHCP, Inc.
President |
Welcome, NC
June 1995 to Present
Continue to service external customers. |
Install, maintain and troubleshoot various WAN/LAN configurations for several clients. Operating environments include: Stratus/HPUX, AIX, Solaris, FreeBSD, OpenBSD, Linux, Windows NT and Novell NetWare. Cisco and Nortel router installation and configuration. Configured Unix-based clustered firewalls with external mail, name, caching and web services in DMZ. Unix and NT web, mail, database, routing and name services. Whole-network migration to and from Unix, NetWare and NT. Created custom scripts for automated data transfer, reporting, backups, configuration management, administration, etc. Design unix-based NAS and cross-platform enterprise-wide backup and recovery solution. Network discovery, documentation and monitoring. Custom-built hardware ranging from a simple worksite Windows pc to a multiprocessor Unix workgroup server. Train admins on various topics including disaster recovery, ipv4 subnetting and Unix/NT administration. |
Novant Health
Engineer, Unix Systems |
Winston-Salem, NC
December 2000 to December 2004 |
Some accomplishments include: migration to Tivoli Storage Manager for backups, implementation of Big Brother to actively monitor NT/Unix servers and SAN components, configuration of SAN for Unix/NT server consolidation (StorageTek D178/Brocade Silkworm 12000, IBM Shark/McData Fabric Switches). Created scripts that reduced 3-hour downtimes to 15 minutes for 200+ servers, provided a standard interface for configuring/maintaining all TSM client configurations, and made various other administrative tasks quicker for multiple servers. Perform administration and maintenance of a mail server farm supporting over 7,000 end-users. Install and maintain samba, web and other services on various Unix servers. Built and configured Linux servers to provide external corporate mail and name services. Cataloged and documented data across resource servers and put in place data retention policies based on the needs of the owners. VMware ESX Server and VMware GSX Server installation and configuration. Configured Veritas Cluster Server on Solaris and Windows hosts. Systems: IBM pSeries (p690/p650: AIX 4.x, 5.x and Linux), IBM xSeries (Intel architecture: Linux, FreeBSD, VMWare ESX and VMWare GSX), IBM zSeries (S/390: Linux, very limited experience). Also some Sun and HP systems, as well as older IBM systems. Sun, HP, AIX and Veritas filesystem and volume management. |
Inacom Information Systems
Senior Systems Engineer |
Greensboro, NC
July 1997 to March 2000
Left for full-time Unix admin position. |
Install, maintain and troubleshoot various WAN/LAN configurations for several clients, including American Express and Spectrum Laboratory Network. Operating environments include: HPUX, AIX, Linux, Windows NT, OS/2 and Novell NetWare. Fault tolerance and clustering provided by Octopus and Veritas products. Responsible for design and implementation of wide area network connection of several hospitals to central medical laboratory, including routing and firewalls. Cisco, Bay Accelar, and Adtran configuration. Checkpoint Firewall-1 installation and configuration. Windows NT migrations from Novell NetWare. Network printing to and from every operating system. Microsoft Exchange server setup and administration. Creation of scripts for backup and various administrative functions for various hardware and software platforms. Perl and shell scripting. Created Microsoft Access programs for inventory control and interfacing with Sybase database. |
DP Software Services
Network Engineer |
Lexington, NC
November 1995 to June 1997
Left to find a more challenging job. |
Install, maintain and troubleshoot various LAN topologies for several clients incorporating BSD, SCO, Linux, Windows NT and Novell NetWare. Custom application installation and support. Configure automated dial-up connections between corporate offices and restaurants to allow batch processing of daily cash flow and supply usage. LAN/server/desktop/hardware/application support for industries ranging from fast-food to construction. Computer hardware and software upgrades, including servers and client machines. |
United States Navy
Nuclear Reactor Operator
Advanced Electronics Technician |
East Coast, USA
June 1988 to June 1996
Honorably Discharged. |
Served six years active duty and two years inactive reserves. Control, maintenance and troubleshooting of submarine nuclear reactor and all associated electronic control and protection equipment of two types of nuclear reactor plants. Responsible for reactor plant quarterly data report. Responsible for training and qualifications of engineering department personnel and all related paperwork. Converted engineering department record-keeping from cardfiles and DBase to Microsoft Access. Built customized point-and-click interface for the new database system. Taught basic computers and WordPerfect. Achieved rank of Petty Officer Second Class and qualified Submarines on two classes of fast attack submarines. Allowed TOP-SECRET clearance and performed functions for ship captain on various underway missions. Received several awards and letters of accommodation for dedication and quality of work.
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