David Wagner

david@david-wagner.org
https://david-wagner.org/

Summary

Senior/SME Systems Administrator/Engineer with over twenty years of experience in both commercial and government sector projects. Roles have included administering systems (hardware and OS), storage area networks, directory servers, and middleware components, and developing scripts for operations and maintenance.

Skills

Operating Systems: Solaris, Linux (particularly Red Hat Enterprise Linux), FreeBSD
Storage (SAN/NAS) Hardware: Oracle ZFS storage appliances, Sun/Oracle StorageTek arrays, Brocade Silkworm switches, EMC Symmetrix storage systems, EMC Clariion arrays
Middleware: Apache HTTPD web server, Apache Tomcat Java servlet container, Oracle Unified Directory LDAP server, Oracle Directory Server Enterprise Edition LDAP server, Oracle iPlanet web server, OpenLDAP directory server, Broadcom SiteMinder access manager, Oracle WebLogic Java application server
Programming and Scripting Languages: Perl, Bourne shell (including Bash and ZSH), C/C++, Java, PowerShell
Infrastructure Software: Oracle VM Server for SPARC (Solaris Logical Domains/LDoms), Veritas Volume Manager, Veritas File System, Kerberos, Sun/Oracle Common Array Manager, Brocade FabricOS, EMC PowerPath, EMC SYMCLI, EMC ControlCenter (ECC), EMC VolumeLogix

Selected Training

Oracle VM Server for SPARC: Installation and Configuration, December 2016

Red Hat System Administration II, October 2015
SiteMinder Administration 200, December 2014
Red Hat System Administration I, August 2014
Sun Java System (Oracle) Directory Server Enterprise Edition 7: Maintenance & Operation, August 2010
Solaris 8 Operating Environment Systems Administration I and II, 2001

Education, Certifications, and Clearances

Bachelor of Science degree, Computer Science major, Virginia Tech, May 2000
CompTIA Security+ ce certification, issued November 2010, valid until November 2026
Active Top Secret security clearance, Department of Defense, issued June 2005, last reviewed April 2021

Recent Experience

May 2005 — present
Project: DISA Intranet Services, Defense Information Systems Agency
Roles: Systems Administrator/Engineer (including Application Administrator, LDAP Directory Administrator, and SAN/NAS Storage Administrator)
Employers: Computer World Services (2019 – present), NOVA Corporation (2014 – 2019), Daston Corporation (2009 – 2014), ManTech International (2005 – 2008)

Lead Unix administrator for the DISA Intranet Services software suite. Environment capabilities included applications for collaboration, records management, EEO and IG case management, financial management, and enterprise-level web, database, and identity and directory services, including the public-facing agency website.
Supported day-to-day operations, including software deployments, patching for information assurance/vulnerability management (IAVM) compliance, configuration changes, and infrastructure software updates.
Regularly developed scripts to automate operational and maintenance tasks, data synchronization, and support infrastructure needs.
Produced and implemented standardized configurations and processes across the entire Unix environment, both for Solaris 8/10/11 and for Red Hat Enterprise Linux 7. This setup provided a standard, STIG-compliant base for the entire suite.
Performed OS upgrades and migrations from Solaris 8→10→11, both solo and in coordination with application administrators as necessary.
Migrated the entire SPARC-based server farm onto new equipment utilizing virtual machines under Solaris Logical Domains (LDoms).
Integrated a storage area network (SAN) utilizing Sun StorageTek equipment allowing for database expansion. Later replaced the SAN with an Oracle ZFS Storage Appliance Network Attached Storage (NAS) device serving as the primary storage for the entire development and testing enclaves of the environment, housing both operating system and application data.
Maintained a Sun/Oracle directory (LDAP) functioning as the back-end authentication data and general information store for several applications in the IS suite, as well as a central data source for other applications in the agency.
Participated in and helped coordinate several environmental moves, involving both physical equipment moves and migrating applications to new equipment hosted elsewhere, all with the associated configuration changes.
Also participated in several periodic security audits (also known as “security readiness reviews (SRRs)”, “site visits”, or “assessment and authorization (A&A) reviews”), working with agency security personnel and producing documentation and artifacts (“STIG checklists”).

Additional Experience

September 2011 – April 2014
Role: Google Apps Deployment Specialist
(Part-time in parallel with DISA duties)
Employer: Daston Corporation

Acted as a consultant to other deployment staff on integrating external technologies (directories, SSO, etc.).
Implemented Google Apps Directory Sync for a customer to integrate their Active Directory and Google Apps accounts.

April 2004 – June 2004
Project: Quality Assurance Lab Support, Freddie Mac
Role: Systems Administrator
Employer: Uniplus Consultants

Responsible for re-configuring systems as new applications entered the lab environment.
Primary tasks involved performing operating system loads, initial OS configuration, and installing and configuring software packages for customer use.

June 2001 – September 2003
Project: Database Operations, AOL Internet Services
Role: Systems Administrator (also including SAN Storage Administrator)
Employer: America Online

Primary Unix administrator for over fifty production servers, and SAN administrator for a storage network supporting the entire department.
Regular tasks included configuring operating systems and attached storage for customer use, allocating storage to servers on demand, and diagnosing and repairing software-related issues.
Also participated in an on-call rotation providing 24×7 coverage.

July 2000 – December 2000
Role: Systems Administrator (Consultant)
Employer: Taos

Installed and configured Sun hardware in a lab environment.

May 1998 – December 1998
Role: Systems Administrator (Co-op)
Employer: Silicon Graphics

Supported the “Government Technology Center”, a demonstration center featuring a wide variety of SGI server and storage equipment.

Additional Experience (continued)

September 1997 – May 1998
Role: Website Developer, Facilities
Employer: Virginia Tech

Created and updated content for the Facilities website as directed by management.

January 1997 – August 1997
Roles: Programmer (Co-op)
Employer: IBM

Updated and developed new C/C++ code on OS/2 and Windows NT platforms.

Additional Training

Amazon Web Services 101, October 2011
EMC Clariion Administration, 2003
Netscape Directory Services: Analysis and Planning 6.0, 2002
Netscape Infrastructure Server 6.0 Maintenance and Operations – Directory Server, 2002
EMC Symmetrix ControlCenter 4.3, 2001
EMC Symmetrix Fundamentals for Administrators, 2001
Sybase System and Database Administration: Adaptive Server Enterprise, 2001

Inactive Certifications

Google Apps Certified Deployment Specialist, September 2011, renewed July 2013
Google Apps Certified Sales Specialist, June 2013