Objective

Seeking employment in an environment that will provide a variety of challenges with opportunities for learning and professional growth.

Skills

• Operating Systems and Servers
• Linux on Intel, including Red Hat Enterprise Linux, Debian Linux, and others
• AIX LPARs on IBM Power6 pSeries hardware
• HP-UX on HP 9000 servers
• Solaris on Sun UltraSPARC servers
• Native LVM on Linux, HP-UX, and AIX
• Multipath fibre channel storage with HP AutoPath/SecurePath and EMC PowerPath
• Server monitoring with MRTG, nmon, and Zabbix
• Cross-platform integration using Kerberos, LDAP, and Samba
• Migration of Linux servers from physical hardware in to VMWare
• Solaris, AIX, and RPM package creation
• Knoppix remastering to produce custom utility CDs
• Windows Server 2008 application setup

Networking

• Wireshark and tcpdump for application and network troubleshooting
• TCP/IP and Ethernet configuration on multiple platforms
• Load-balanced services
• Firewall ruleset planning and design
• Host-based firewalls with IPTables
• QoS planning and implementation
• Tagged and port-based VLAN configurations
• Custom OpenWRT network appliances

Applications

• IBM WebSphere on UNIX platforms
• Apache web server, including reverse proxies, SSL, and WebDAV
• LDAP services with IBM Tivoli Directory Server and OpenLDAP, including use of LDIF and Perl Net::LDAP module
• Database applications using IBM DB2, Oracle, Postgres, MySQL, SQLite, and Berkeley DB
• Configuration of git, Subversion SVN , and CVS version control repositories
• Web server traffic analysis with AWStats
• Compilation, packaging, and installation of open source software
• General SSL use, including operation of private certificate authorities
• DNS services using ISC Bind, PowerDNS, and Active Directory
• SMTP mail services using Sendmail and Postfix
• Apache Hadoop cluster management
• OS and application configuration management using puppet
• MongoDB installation
• ActiveMQ installation and configuration
• Tomcat server administration
• WebFOCUS administration
• IIS 7.x configuration for ASP.NET hosting

rogramming and Scripting

• Bourne/Korn shell scripting, including use of sed and awk
• Perl scripting
• Python/Jython scripting
• PHP web programming
• Basic C and C development on UNIX platforms with make and gcc
• PowerShell scripting
• Understanding of XML and XSLT

Work Experience

Sr Consultant - Confidential

Tech lead for application infrastructure/operations team. Drove improvement of disaster recovery procedures. Assisted transition of reporting support from development team to operational support team. Advised on PCI certification remediation plan for reporting application. Worked with multiple teams to migrate JBoss applications from software encryption to hardware-protected keys.

Consultant - Confidential

Worked on new application implementations. Installed infrastructure for ASP.NET application on Windows Server 2008 and transitioned primary support to web administration team. Redesigned WebFOCUS reporting infrastructure to address performance issues before production rollout. Documented installation and configuration procedures. Wrote custom utility and installation scripts. Wrote custom SQL queries to retrieve information on schedules from vendor schema. Documented deployment and support processes.

Sr. System Administrator - Confidential

• System Administrator in Linux PHP LAMP web environment. Supported Linux servers running on physical hardware, Xen virtualization, and Amazon EC2. Maintained OpenLDAP internal authentication directory. Scripted bulk conversion and load of employee photos to LDAP directory. Managed Apache Hadoop compute clusters. Configured git repositories using gitosis and ssh keys. Maintained centralized configuration using puppet. Configured and supported MySQL databases. Installed MongoDB servers.
• System Administrator consultant - Advanced Resources - St. Louis, MO January 2007 April 2011 System Administrator in Linux and AIX environment for shared datacenter with global users. Managed Red Hat Enterprise Linux on HP, Dell, and VMware servers, and AIX on IBM Power6 hardware. Supported servers hosting applications including Oracle, SAS, Sterling GIS, WebSphere, Tibco, SiteMinder, WebFocus, Samba, and Apache. Implemented Kerberos on Linux and AIX for authentication against Active Directory. Configured server monitoring and reporting using Zabbix and nmon. Wrote P2V conversion tools for migrating Red Hat Enterprise Linux from physical servers to VMWare. Wrote automation scripts for application administrators to perform deployments directly from version control repositories to WebSphere and WebSphere Portal. Wrote scripts to perform auditing and validation of DNS data. Advised various internal groups on use of SSL certificates and LDAP authentication. Implemented secure file transfer system using Apache and SSL client authentication. Consolidated Subversion repositories from multiple servers to a single host to reduce administrative overhead. Completed online SAN migration on AIX using LVM, PowerPath, and dynamic LPAR operations. Wrote interim network backup tool for AIX SAS environment pending migration to a shared backup infrastructure. Recommended removing redundant servers for non-critical systems as they moved to VMWare to reduce licensing and administrative requirements.

System Administrator - Hudson Global Resources / Centene Management

Confidential

System Administrator in HP9000 environment. Supported HP-UX 11i servers running IBM Tivoli Directory Server, IBM WebSphere, Tibco, Oracle, and Amisys. Managed storage using HP LVM and OnlineJFS Veritas . Built servers using Ignite-UX. Evaluated patch requirements and software prerequisites for new software installations. Compiled and installed Perl modules and other software as needed. Built IBM Tivoli Directory Server environment to be used for external user authentication in web applications. Identified architecture issues in Directory Server implementation and worked with other groups to resolve prior to production date. Wrote SAN storage auditing script.

System Administrator consultant - Confidential

System Administrator in Linux environment for shared datacenter hosting environment . Managed servers running Red Hat Enterprise Linux on HP Proliant servers and VMWare virtual machines. Supported servers hosting applications including Oracle RAC, WebSphere, Tibco, SiteMinder, WebFocus, and Apache. Generated reports on server utilization and web server traffic. Wrote scripts for system automation and granted nonprivileged users access through sudo and Webmin. Took part in disaster recovery exercise involving bare-metal recovery of servers and applications. Implemented host-based firewalls using IPTables to improve server isolation on shared network. Maintained Apache web servers for both application and administrative access. Coordinated deployment of externally-accessible Subversion version control system.

Software Engineer consultant - Confidential

• Managed Apache, iPlanet, WebLogic, and WebSphere on Solaris servers. Maintained DNS on ISC Bind with numerous domains and worked with domain management company on transfers and registrations. Installed Java applications and web content in production and non-production environments. Worked with automated systems written in Perl and shell scripts using ssh public key authentication. Prepared disaster recovery systems and assisted in writing DR procedures for Operations personnel. Worked with in-house SSL certificate authority. Part of on-call rotation supporting high-volume production sites and critical business applications 24x7. Drafted initial standards for secure WebSphere environments.
• Independent Contracting and Research June 2002 December 2003 Engaged in various projects, including:
• Linux server installation
• Backup automation scripts
• Digital media authoring
• Creation of a run-from-CD desktop UNIX system based on BSD
• PHP/MySQL web application migration and development
• Korn and perl scripting to automate administation and troubleshooting
• Advised on WebSphere-related issues prior to application deployment

Sr. Engineer consultant - Confidential

Linux and WebSphere administrator for a WebSphere/DB2 development project. Responsible for all servers running Red Hat Linux. Identified, installed, and configured required third-party software. Designed and implemented automated build and deployment system for Java code. Worked with client web farm team on preparation of production environment. Managed CVS repository for project files. Implemented WebSphere authentication using LDAP and assisted developers with application security design. Designed secure automatic file transfer system. Managed Samba-based file servers. Configured system monitoring and statistics-gathering software. Wrote documentation for use both by project staff and client web farm staff.

Consultant - Confidential

UNIX system administrator managing HP and Sun servers in a Cobol/C/Oracle development environment. Installed third-party software, compiling as necessary. Managed Veritas filesystems and HP LVM. Worked in configuration management team before moving to UNIX. Maintained master RCS and build environments for multiple projects. Worked with developers to diagnose errors. Debugged build system written using C-shell and Perl scripts. Updated C code for compatibility with newer compilers.

Network Administrator - Confidential

• Primary UNIX administrator in department system/network administration team. Managed a heterogeneous environment including Windows NT, HP-UX, Digital UNIX, and Linux. Configured and maintained the Apache web server for the departmental web site. Recommended hardware purchases for both UNIX and Windows systems. Managed Windows NT domain, including primary domain controller and network file/print services.
• Publications
• Securing Web Consoles with Apache , Sys Admin magazine, vol. 15, no. 2, pp. 10 - 15, February 2006.