Years in IT Support
Professional experience spans enterprise support, system administration, endpoint operations, secure access support, and security-aligned troubleshooting across multiple sectors.
U.S. Army Veteran · Endpoint Management · Identity & Access · Security Operations · Enterprise Support
Cori Walker
// IT & Cybersecurity Professional · CompTIA CySA+ · CompTIA Security+ · Microsoft Intune · Entra ID · System Administration
10+ Years Experience54,000+ Users SupportedEducation · Healthcare · Government · DefenseCySA+ · Security+Intune · Entra ID · Active Directory
U.S. Army veteran and IT/cybersecurity professional with 10+ years supporting enterprise environments across education, healthcare, government, and defense. Background includes system administration, endpoint management, Microsoft Intune, Entra ID, and security operations. Holder-asserted CompTIA CySA+ and Security+.
CySA+Security+
// 01
By the Numbers
Personnel Supported
Provided remote technical support at scale in a high-volume environment serving a large user population with disciplined ticket handling and issue resolution.
Years of Military Service
Served in the U.S. Army in a technology-focused role that strengthened leadership, process discipline, operational accountability, and customer support under pressure.
Sectors Supported
Experience includes education, healthcare, government, and defense environments where uptime, compliance, documentation, and service quality all matter.
// 02
Operational Highlights
Education IT · Endpoint Support · Identity Management
Supports Large-Scale School Technology Operations
At Fulton County Schools, Cori provides enterprise-level support across a distributed educational environment, handling endpoint troubleshooting, device lifecycle support, account access needs, and secure identity management through Microsoft Entra ID.
Entra IDEndpoint SupportDevice LifecycleEducation IT
Healthcare Support · Tier III Troubleshooting · Remote Users
Delivered Advanced Support in a Mission-Critical Healthcare Environment
While supporting Henry Schein One, he resolved complex Tier III issues involving operating systems, applications, remote connectivity, and user access while helping maintain uptime and service continuity for a distributed workforce.
Tier III SupportRemote SystemsHealthcare ITService Continuity
Government IT · Hybrid Infrastructure · System Administration
Maintained Secure Server and Hybrid Environment Operations
At General Dynamics Information Technology, Cori supported Windows Server administration, Active Directory, Group Policy, DNS, DHCP, WSUS, Hyper-V, and automated patching workflows within cloud and hybrid environments that required structured security controls.
Windows ServerActive DirectoryHybrid InfrastructureWSUS
Military IT · Leadership · Security-Focused Operations
Built a Foundation of Discipline, Support, and Technical Accountability
His U.S. Army service included user account support, PowerShell-based configuration, mobile device setup, COMSEC support, VTC coordination, troubleshooting, and direct supervision of personnel in high-accountability environments.
Army VeteranPowerShellCOMSECOperational Discipline
// 03
Experience
Jul 2025 — Present
Endpoint Support · Identity Management · Education IT
Technology Support Specialist III
Fulton County Schools · Atlanta, Georgia
- Supports and maintains computer systems, applications, audio/visual equipment, and peripherals while installing, diagnosing, repairing, maintaining, and upgrading hardware and software to ensure optimal performance.
- Provides enterprise-level support in a distributed educational environment serving students, faculty, staff, and administrative systems.
- Assists with testing, packaging, installation, and deployment of district-approved software and images across servers and workstations.
- Manages user accounts, groups, and access policies through Microsoft Entra ID to support secure identity lifecycle management and role-based access control.
Nov 2024 — Jun 2025
Advanced Technical Support · Healthcare IT · Remote Systems
Technical Support Specialist III
Henry Schein One · United States
- Delivered advanced technical support in a healthcare-focused enterprise environment supporting mission-critical systems and remote users nationwide.
- Resolved complex Tier III issues involving operating systems, applications, and user access.
- Installed operating systems on new computers and configured systems to meet user requirements.
- Diagnosed and resolved remote hardware, network, and software issues across distributed environments to minimize downtime and maintain service availability.
Jun 2024 — Nov 2024
System Administration · Cloud/Hybrid Support · Infrastructure
System Administrator
General Dynamics Information Technology · Atlanta, Georgia
- Provided Tier II and Tier III support in cloud and hybrid infrastructures, resolving escalated incidents and helping maintain availability across virtual machines, storage, and network services.
- Configured, implemented, and maintained Windows Server services including DNS, DHCP, Active Directory, Group Policy, WSUS, and Hyper-V.
- Executed automated installation, upgrade, and patching workflows for Unix and Windows systems in cloud-based environments.
- Diagnosed and resolved issues to support continuous delivery, stable operations, and secure systems administration practices.
Oct 2022 — May 2024
DoD Support · Account Administration · Enterprise Help Desk
Help Desk Technician
General Dynamics Information Technology · Augusta, Georgia
- Supported end users with issues related to specialized DoD software systems and applications through phone, email, chat, web forms, and other support channels.
- Applied advanced troubleshooting, issue isolation, and diagnostic techniques to identify problems, recommend solutions, and escalate tickets according to defined procedures.
- Supported NIPR, SIPR, and JWICS administration, processed SAARs, created network accounts, pushed Group Policies, and managed security groups.
- Completed system lifecycle activities including deployment, maintenance, retirement, software configuration, SCCM-based ticket resolution, and documentation development.
Mar 2022 — Oct 2022
Remote Support · Active Directory · High-Volume Service Desk
Remote Help Desk Technician
TMR, Inc. · Remote
- Provided technical support and troubleshooting to network, desktop, and systems hardware and software for more than 54,000 personnel.
- Handled a high volume of phone calls, emails, and online chat support while resolving user issues efficiently and professionally.
- Resolved and escalated trouble tickets using the BMC Remedy ticketing system.
- Managed user accounts in Active Directory, supported password resets, used Remote Desktop Connection for troubleshooting, and guided users on IT best practices.
Jul 2014 — Aug 2022
Military IT · Leadership · Technical Operations
Information Technology Specialist
United States Army · United States
- Evaluated issues involving applications, workstations, and network components to support users and manage technical problems.
- Used PowerShell scripts to configure user devices, reviewed and created user accounts, and managed systems within Active Directory organizational units.
- Developed short- and long-term training plans, trained personnel on standard operating procedures, and supervised staff in support of DoD operations.
- Led COMSEC equipment updates and installations, managed mobile devices, supported VTC meetings, and resolved trouble tickets through BMC Remedy and ServiceNow.
// 04
Credentials & Qualifications
Endpoint & Identity
Microsoft Intune, Entra ID, IAM, Device Lifecycle Support
Hands-on experience supporting endpoint environments, secure user access, account management, and role-based access practices across enterprise and education settings.
Core Certifications
CompTIA CySA+ · CompTIA Security+
Active certifications reinforce Cori’s grounding in cybersecurity analysis, threat awareness, security operations, and security-first thinking across technical support and infrastructure roles.
Systems Administration
Windows Server, Active Directory, DNS, DHCP, WSUS, Hyper-V
Experience includes server administration, automated patching, policy enforcement, account support, and day-to-day maintenance in structured government and hybrid infrastructure environments.
Support Platforms
ServiceNow, BMC Remedy, SCCM, Citrix, VMware, PowerShell
Comfortable across enterprise support tooling, ticketing systems, virtualization platforms, remote troubleshooting workflows, and scripted support activities.
Vendor certifications are holder-asserted.
// 05
Technical Skills
// Endpoint, Access & User Support
Endpoint ManagementAdvanced · 92
Microsoft Entra IDAdvanced · 90
User Account SupportCore · 95
Device Lifecycle ManagementStrong · 88
// Systems, Infrastructure & Administration
Windows Server / Active DirectoryAdvanced · 90
DNS / DHCP / Group PolicyStrong · 86
Hyper-V / VirtualizationStrong · 82
Windows / Linux / MacAdvanced · 89
// Security Operations & Compliance
Incident Response SupportStrong · 84
Security Monitoring AwarenessStrong · 82
Access Control / IAMAdvanced · 88
Regulated Environment SupportCore · 91
// Tools, Platforms & Workflow
ServiceNow / BMC RemedyAdvanced · 90
SCCMStrong · 80
PowerShellStrong · 83
Citrix / VMwareStrong · 81
// 06
Let’s Put Cori To Work
Best aligned for endpoint support, system administration, IAM support, enterprise help desk leadership, regulated-environment IT operations, and cybersecurity-adjacent roles that require disciplined execution, customer-focused troubleshooting, and strong technical accountability.
// 07
Education
Accumentum®
CompTIA CySA+
Cybersecurity Analyst training reinforces Cori’s foundation in security operations, threat analysis, incident response awareness, and defensive security thinking across enterprise environments.
Accumentum®
CompTIA Security+
Security+ training strengthens core knowledge in security principles, access control, risk awareness, secure system support, and foundational cybersecurity practices.
U.S. Army
Technical Operations, Leadership & Mission Support Development
Military service developed a durable foundation in procedural discipline, technical troubleshooting, team leadership, secure operations, and performance in high-accountability environments.
Ongoing Development
Continued Cybersecurity Education
LinkedIn reflects continued pursuit of additional certifications and formal cybersecurity education, supporting long-term growth in security-focused and infrastructure-aligned roles.
Content from this professional’s Accumentum Alumni Success Profile.
Credentials
Certifications are listed by the professional. Click Verify to confirm one with the issuing organization.
CySA+
CompTIA
Holder-assertedOpens CompTIA's official verification (verify.CompTIA.org) with the code pre-filled. CompTIA's portal uses reCAPTCHA, so the final check happens on CompTIA's site.
Security+
CompTIA
Holder-assertedOpens CompTIA's official verification (verify.CompTIA.org) with the code pre-filled. CompTIA's portal uses reCAPTCHA, so the final check happens on CompTIA's site.
Practical pins
Accumentum-scored PathProof practicals
- None yet