Doug Mccullar
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Doug Mccullar Email & Phone Number

Active Directory Administrator at DNI (Delaware Nation Industries)
Location: Harrah, Oklahoma, United States 14 work roles 2 schools
1 work email found @onenet.net 2 phones found area 405 LinkedIn matched
✓ Verified August 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 2 phones

Work email d****@onenet.net
Direct phone (405) ***-****
LinkedIn Profile matched
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Role
Active Directory Administrator
Location
Harrah, Oklahoma, United States
Company size

Who is Doug Mccullar? Overview

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Quick answer

Doug Mccullar is listed as Active Directory Administrator at DNI (Delaware Nation Industries), a with 224 employees, based in Harrah, Oklahoma, United States. AeroLeads shows a work email signal at onenet.net, phone signal with area code 405, and a matched LinkedIn profile for Doug Mccullar.

Doug Mccullar previously worked as O365 Cloud Administrator at Dni (Delaware Nation Industries) and Head Coach at Harrah Boxing. Doug Mccullar holds Bachelor Of Science (Bs), Organizational Leadership from Southern Nazarene University.

Company email context

Email format at DNI (Delaware Nation Industries)

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{first}@onenet.net
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Profile bio

About Doug Mccullar

IT Professional with over 30 years’ experience working in technology and over fifteen years’ experience in managing servers and Help Desk operations as well as analyzing systems and technical processes and implementing improvements to the overall efficiency of all systems. I have over 25 years’ experience in supervising Help Desk and technical staff. Recognized for leadership in project planning, scheduling, prioritization, risk planning, work assignments, and defining the scope for enterprise information systems projects. Excellent knowledge and experience in all aspects in managing network operations and working with non-technical staff in the use of equipment and applications. I have extensive knowledge of managing Windows servers, Microsoft Exchange, Active Directory infrastructure, and all aspects of managing the Microsoft LAN environment. Working knowledge in supporting Cisco and Juniper network switches and wireless environment. I have managed a team of System Administrators and Helpdesk experts to achieve the needs and goals of the agency. I have developed and coordinated a mutually beneficial partnership and working relationship between all departments and technology groups. I have designed and implemented significant improvements in technology with overall performance in operations for all departments. Identified and managed the agencies allocation of resources to complete projects on time and within budget. Managed Windows server environment with Server 2016, 2019, 2012, 2008, 2003 and Exchange servers 2003, 2007, 2010, 2013, and 2016. Successfully migrated from several different Exchange server levels including from on-site server to the cloud. Managed Cisco/Juniper network with approximately 70 switches and 60 wireless access points. Successfully migrated network infrastructure switches and wireless from Cisco to Juniper switching and wireless.

Listed skills include System Administration, Servers, Group Policy, Microsoft Exchange, and 41 others.

Current workplace

Doug Mccullar's current company

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DNI (Delaware Nation Industries)
Dni (Delaware Nation Industries)
Active Directory Administrator
oklahoma city, oklahoma, united states
Website
Employees
224
AeroLeads page
14 roles

Doug Mccullar work experience

A career timeline built from the work history available for this profile.

Active Directory Administrator

Current

Midwest City, Oklahoma, United States

• Active Directory management across multiple domains in support of the Defense Information Systems AgencyActive Directory Systems Administrator supporting the United States Armed Services and various DoD organizations in CONUS and OCONUS.• Responsible for server and user security enterprise support services.• Working in a secure dual-domain environment comprising more than 4 million user accounts.• Experienced with system administration, installation, support, and maintenance with servers running Microsoft Windows 2008, 2012, and 2016 server operating systems. The servers include a combination of both physical and virtual operating environments. They are also both local and remote systems administration.

Jan 2024 - Present

O365 Cloud Administrator

Tinker Afb

Skills: Windows 365-Cloud Administration · System Administration · Information Security · Security Management · Powershell · Remote Troubleshooting · Information Technology · Software Troubleshooting · Windows Servers· Problem Solving · Technical Support · Security ClearanceAdminister and manage the Office 365 cloud environment, including Exchange Online, OneDrive, and Teams, and other online applications. Implement and maintain security, privacy, and compliance policies for Office 365. Monitor and troubleshoot technical issues related to Office 365 servers and services. Perform software updates and upgrades for Office 365 services. Manage and assign user licenses for Office 365 services as needed. Provide support for Office 365 applications and services. Collaborate with cross-functional teams to improve Office 365 deployment and migration.

Feb 2023 - Jan 2024

Head Coach

Harrah Boxing

Harrah, Oklahoma, United States

Coaching · Boxing Competition Training · Training Group Training · Group Exercise · Sports Coaching · Youth Engagement · Positive Youth Development · Core Strength · Stretching · Personal Training · Cardiovascular Fitness · Boxing · Fitness · Youth Programs · Youth Participation ·

Active Directory Administrator

United States

• Active Directory management across multiple domains in support of the Defense Information Systems AgencyActive Directory Systems Administrator supporting the United States Armed Services and various DoD organizations in CONUS and OCONUS.• Responsible for server and user security enterprise support services.• Working in a secure dual-domain environment comprising more than 4 million user accounts.• Experienced with system administration, installation, support, and maintenance with servers running Microsoft Windows 2008, 2012, and 2016 server operating systems. The servers include a combination of both physical and virtual operating environments. They are also both local and remote systems administration.

Jun 2020 - Oct 2021

Network Administrator

Oklahoma City Metropolitan Area

May 2020 - Jul 2020

System Administrator

Oklahoma City, Oklahoma Area

Aug 2017 - Oct 2019

Contractor

Oklahoma Education Association

Oklahoma City, Oklahoma Area

• Troubleshooting Active Directory and database corruption.• Build new forest and created trust to the original domain.• Migrate users and computers to new forest/domain.• Designed and built Exchange 2016 server and move mailboxes from old Exchange 2010 server.• Connect Office365 and ADFS synchronization to the new server

May 2017 - Jul 2017

Contractor

Oklahoma City, Oklahoma Area

Active Directory – Contract• Troubleshooting Active Directory and DNS issues within the domain.• Built new domain controller to have a backup DC for the original domain controller.• Create new backup procedure to backup file servers and domain controllers. • Troubleshooting network connectivity issues.• Update Windows 8.1/10 desktops OS updates and Kaspersky Security Suite installation and updates.

Mar 2017 - Jul 2017

Director Of Information Technology

Shawnee, Ok

Directed operations of the IT department with budgetary oversight with emphasis on process improvements and optimization of organizational performance. Designed and implemented new technology, hardware and system upgrades including Microsoft Directory Services, the Juniper network and the Palo Alto firewall. Successfully designed, implemented and managed the installation of the University’s new network infrastructure; managed budget, technology, vendor selection, design, and over-all strategic vision of network technology. Designed plans for migrating university exchange servers from Exchange 2003 Enterprise servers to Exchange 2010 Enterprise servers; built new server for the new system and mail services migration; delivered successful server upgrade and mail migration as well as eliminating one Exchange server from the organization. Reduced organizational costs by over $11,000 annually by successfully designing and implementing cloud services for Office 365 and e-mail services for students eliminating Outlook licenses.

Aug 2012 - Jun 2016

Coordinator Of It System Administration

Oklahoma City, Ok

Manage and maintain over 100 servers as well as support and manage an Exchange 2007 environment with over 1200 users. Manage Active Directory Services for the Windows forest and domains, DNS, WINS, DHCP, and other network services within the organization. Designed and managed SCCM 2007 infrastructure for the college. Extensive knowledge of Windows operating systems with the latest version including but not limited to Server 2003 and 2008, Windows XP, and Windows 7.

Oct 2009 - May 2012

Director Of Local Area Network (Lan) Operations

Higher Education

Oklahoma City, Ok

Director of LAN Operations for the Oklahoma State Regents for Higher Education included the Oklahoma Guaranteed Student Loan Program, and OneNet statewide telecommunications network. Planned, developed, and managed the overall strategic goals of the agency’s technology servers and Active Directory services. Proactively evaluating and recommending changes to current technology requirements to meet the organization's needs. Planned and managed the computer operations for the agency. Worked with technical staff to develop and maintain disaster recovery procedures, compliance, security policies. Worked with the Director of Fiscal Affairs to develop and manage the technology budget.

Jan 2000 - Mar 2009

System Manager For Local Area Network (Lan) Systems

Higher Education

Oklahoma City, Oklahoma

Managed and maintained servers as well as implemented and designed the LAN Systems for the Oklahoma State Regents for Higher Education, included the Oklahoma Guaranteed Student Loan Program, and OneNet statewide telecommunications network. Supported and managed data retention and recovery. Designed and managed Active Directory Services for the Windows forest and domains. Designed and managed DNS, WINS, DHCP, IAS, and other network services as well as the Microsoft Exchange servers within the organization. Worked in the development, design, and implementation of the Firewall security system and maintained virus security for entire agency. The senior technical support technician for all Regents and OneNet help desk needs.

Jan 1996 - Jan 2000

Operations Specialist

Higher Education

Oklahoma City, Oklahoma Area

Managed the daily operations and upgrades for Windows Servers, Banyan Vines, and Lotus Notes networks as well as the daily management of Helpdesk operations for the agency. Responsibilities included, but were not limited to installing and building PC’s, troubleshooting PC software, hardware and network problems, and senior help desk technical support to all users. Identified, researched, and resolved technical problems while responding to telephone calls, e-mail and personnel requests for technical support. Tracked and monitored the problem to ensure a timely resolution. Provided functional and technical support, troubleshooting and diagnosing hardware and software problems, including desktop, laptop, WAN, LAN, and remote systems.

Feb 1994 - Jan 1996
Team & coworkers

Colleagues at DNI (Delaware Nation Industries)

Other employees you can reach at dnigov.com. View company contacts for 224 employees →

2 education records

Doug Mccullar education

FAQ

Frequently asked questions about Doug Mccullar

Quick answers generated from the profile data available on this page.

What company does Doug Mccullar work for?

Doug Mccullar works for DNI (Delaware Nation Industries).

What is Doug Mccullar's role at DNI (Delaware Nation Industries)?

Doug Mccullar is listed as Active Directory Administrator at DNI (Delaware Nation Industries).

What is Doug Mccullar's email address?

AeroLeads has found 1 work email signal at @onenet.net for Doug Mccullar at DNI (Delaware Nation Industries).

What is Doug Mccullar's phone number?

AeroLeads has found 2 phone signal(s) with area code 405 for Doug Mccullar at DNI (Delaware Nation Industries).

Where is Doug Mccullar based?

Doug Mccullar is based in Harrah, Oklahoma, United States while working with DNI (Delaware Nation Industries).

What companies has Doug Mccullar worked for?

Doug Mccullar has worked for Dni (Delaware Nation Industries), Harrah Boxing, Goodwill Industries International, Buy For Less, and A3 Technology Inc.

Who are Doug Mccullar's colleagues at DNI (Delaware Nation Industries)?

Doug Mccullar's colleagues at DNI (Delaware Nation Industries) include Jason Klimeck, Peter Day, Al Washington, Tommy Pollard, and Christy Huffman.

How can I contact Doug Mccullar?

You can use AeroLeads to view verified contact signals for Doug Mccullar at DNI (Delaware Nation Industries), including work email, phone, and LinkedIn data when available.

What schools did Doug Mccullar attend?

Doug Mccullar holds Bachelor Of Science (Bs), Organizational Leadership from Southern Nazarene University.

What skills is Doug Mccullar known for?

Doug Mccullar is listed with skills including System Administration, Servers, Group Policy, Microsoft Exchange, Disaster Recovery, Windows Server, Help Desk Support, and Hyper V.

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