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Active Directory Manager

San Antonio, TX
October 22, 2018

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Darrell D. Dunn

*** **** *****

San Antonio, TX *8253

832-***-**** (cell)

Professional Summary

Information Technology Professional with 17 years of experience in System Engineering/Administration and Service Desk Management functions. Highly motivated individual with outstanding leadership, team member and customer service skills, also with thorough knowledge and experience of Information Technology operations.


MCITP-Microsoft Certified Information Technology Professional-Windows Server

MCITP-Microsoft Certified Information Technology Professional - Exchange

MCTS- Windows 10, 8,1

MCTS-Windows Vista


Info Work Space Certified (2.5x, 3)

Skills and Knowledge:

System/Server Support, Desktop/Helpdesk Support, ESXI 6x, VMware

Server Builds/Maintenance, Exchange, Outlook, Lotus Notes, SharePoint

3650 Catalyst Switches, Small Business Switches, Internet Information Services (IIS)

Various types of Backups & Restore, Storage, Dell and Hitachi, Backup Exec, VPN, NetApp

Active Directory, Security Groups, Group Policy Management

Various Server Builds, Remedy ARS Altiris, CentOS, Ubuntu

Various types of Antivirus, MacAfee, Sophos, PowerShell

DNS, DHCP, WSUS, LAN, SAN, VSP, Blackberry Configuration, iPhone

TCP IP Configuration, Network Protocols, SSH, Telnet

RAID Configuration Collaboration Applications/Tools

MS Office 2010-2016, Office 365; Windows Server 2008/2012/2016; SQL 2008/2012, Windows 7, 8.1,10, SCCM

Job History:

Root9b LLC

310 Saint Mary’s St. Suite 1600

San Antonio, Texas 78205

Dates Employed: Nov 10 2015 – Current

System Engineer

Manages Active Directory; Group Policy Management

Manages Office 365, licensing, accounts and administration; exchange and SharePoint

Manages EXSI 6x VCenter and Hypervisor and Virtual testing for software and applications; Windows, CentOS and Ubuntu OS’s

Manages company MobileIron Cloud for iPhone 7/8/10 devices

Manage Atlassian Suite server and apps (Jira, Confluence, Stash, Bamboo)

Agent for DEP and VPP to Apple device services

Provides logistical support for company training environment and infrastructure

Manage Company Duo 2FA Factor for various applications

Manage Cisco Call manager hosting cisco VoIP phones

Monitor Service Desk tickets/incidents through Fresh Service

Manage Atlassian Suite applications; Jira, Confluence, Bamboo, Stash

Create and manages user account and distribution/security groups

Built and maintains company training mobile kits; ESXI 5.5, 6.0, 6.5

Configured and Deployed workstations/laptop to company personnel; provides technical support to clients using, Windows 8.1, 10 and Mac Air Books

Utilized Wireshark for network analyzing

Provides Windows scripting/automation

Troubleshooting Printers, wireless cisco AP’s and routers, switches, scanners

Provide support for personnel both hands-on and remotely from 6 different sites

Monitor 2012 SQL DB (backend) for company financial infrastructure

Supports wireless LAN (Cisco)

Provided some administering monitoring of Cisco 5515/5525 ASA

Anti-virus and anti-malware (Sophos)

Coordinates with Vendors for Tech Refresh and software management

Provides administration for 3650 Catalyst switches and SG100-26/200-50 Small Business Switches

Americable Japan

Yokosuka Naval Station, Yokosuka Japan

Dates Employed: Mar 2013 – Sep 2015

System Administrator/Customer Support Technician

Assisted customers with Cable and Internet activation AmeriCable for the naval station for 35 users and 15 Dell/HP/CCTV for live feed; provided troubleshooting steps to customers for cable and Internet

Maintains support for company servers (Dell and CATV)

Configures Outlook (Office 2010); manage Active Directory accounts; Manage Group Policy-- Administers user configurations

Maintain SAN CISCO with 2 terabytes

Create File shares/ Administer file servers in DELL

Wireless configurations (Aruba)

TCPIP configurations

Provide support for Service Desk operations for 24x7 operation monthly on call rotation

configured multiple software applications-MS Office and cable propriety applications

Build Workstations/laptops/docking stations etc. (Windows 7/8)

Provided support for printers, copiers, scanners; provide support for LAN

Katalyst Data Management

1888 Stebbins Drive

Houston, Texas 77043

Dates Employed - Oct 2011 – Dec 2012

Senior Windows Systems Administrator

Active Directory administration; Provide Group Policy Management

Manages Microsoft Exchange Server 2007

Manage Microsoft Volume License

VMWare managed (2 servers on Windows users CO & Canada virtual testing for software and applications) then deployed over to VDI environment.

Creates and manages user account and distribution/security groups

Built and maintains company servers; Managed and maintain Windows Server 2003, 2008

Configured and Deployed workstations/laptop to company personnel; provides technical support to clients using XP Professional, Vista, Windows 7

Sql 2008

Provided Windows scripting/automation

Troubleshooting Printers, wireless routers, switches, scanners

Provided support for Blackberry Services

Monitored Hitachi VSP

Utilized Wireshark for network analyzing

Supports wireless LAN (Cisco)

Anti-virus and anti-malware (Symantec)

Managed VMware Administration

Coordinated with Vendors for Tech Refresh and software management

Provided some UNIX administration (Linux, Solaris) as well as Windows 2003, 2008

The Woodlands Township

2201 Lake Woodlands Drive

The Woodlands, TX 77380

Dates Employed 1 July 07 – 18 July 2011

Helpdesk Manager/System Administrator

Supervises technical team and provides technical support to client : XP Professional, Vista, Windows 7

Installed and Deployed Windows 7 to over 400 personnel; Manage and maintain over 500 personnel with Windows 7 and Vista operating systems

Manage Heat tracking database for helpdesk tickets

Responsible for annual Tech Refresh

Administer SharePoint Server 2007

Builds and maintains company servers

Utilized Wireshark for network analyzing

Manages Altiris Server for software deployments and updates

Managed Exchange Management Console in Exchange 2007

Creates and manages user account and distribution/security groups

Management of Blackberry Enterprise Server and provides support for blackberry device users

Administers Cisco Call Manager Console/Unity Voicemail

Manages Exchange 2007environment

Supports and manages Symantec Backup Exec 11d, 12 backup and restore systems

Manages various software install on a daily basis

Configures IIS

Coordinates with vendors on pc refreshes and parts replacements

Manages inventories on entire company hardware, software and other equipment

Provides technical supports Mobile Data Computers (Panasonic tough books) for Fire Engines and Fire trucks

Configures and supports Air Link Modems in fire engines/trucks/apparatus

Provides technical supports and installs E-route Tracker software for entire

Troubleshoots and rebuilds Dell PCs (hardware/software)

Supports wireless LAN for (Aruba)

Provides technical support for The Woodlands Recreation/Parks and Wildlife/Environmental Services/Aquatics, LAN and wireless Manages and provides technical support at The Woodlands 12 pool locations (wireless)

Provides additional support for Windows 2003/2008 server platforms

Printers, wireless routers, switches, scanners, cameras, card readers, plotters, etc

Administer bluecoat proxy

Assist with annual budget for IT Department

Responsible for over $200,000 of Computer and related equipment

General Dynamics Advanced Information Systems (AIS) DOD

7025 Harbor Blvd Suite 101 Suffolk, VA 23434

Dates Employed: 04-2003 - 04/10/2006

Collaboration Tools Apps/System Administrator

Technical lead for implementing and deploying collaborative tools for U.S. Joint Forces Commands (USJFCOM) J9 directorate (Experimentation and Engineering), the 4 services and our Multinational partners.

Implemented and Applied Collaborative Applications; IWS v2x3x, SharePoint (SPS 2000/3)

Administered Active Directory/Group Policies

Served as Windows Server Administrator (2000/2003) for several major DOD exercises and Events

Administered MMC

Applied and configured IIS Web services to Collaborative Tool applications

Applied IPlanet Web Services to on Windows Based and Solaris Based Collaboration applications

Applied SSL Certificates to all assigned servers

Trained client personnel on Applications

Managed Exchange Server (2003)

Implemented and served as Domain Administrator for domain suites

Configured RAID

Various server builds on Dell 6450/ 6650 Power Edge

Cisco Router configuration/Switches/hubs

Configured TCP IP

Configured DNS Configured IIS

Consulted with clients (DOD and Multinational)

Provide Technical and Help Desk Support (Remedy ARS)

Built and administered 4 Linux and Solaris 8 servers running collaborative applications

Served as liaison for with Multinational client network admin personnel for network and firewall requirements and configuration

Implemented and designed domain configuration on unclassified and classified networks

Uses the STIG process for security and permissions and applies Symantec Norton Antivirus before servers are scanned by network security personnel. Responsible for performing weekly backups for assigned servers

Applied Symantec Norton Antivirus before servers are scanned by network security personnel

Provided daily/weekly Backups for assigned servers

10 years of U.S. Army performing in various IT and Administrative positions


ECPI College of Technology, Richmond, VA 23236

Associates - Computer Information Science/IT Networking (Feb 2003)

Currently attending University of Maryland – Advanced Project Management (IT)


Great leadership and team member skills

Works well in high stress environments


Strives on challenges

Great troubleshooting skills

Contact this candidate