Systems Administrator Technical Support

PROFESSIONAL SUMMARY

SKILLS

EXPERIENCE

SEAN HALEY

SENIOR SYSTEMS ADMINISTRATOR

703-***-**** ***********@*****.*** Laurel, MD 20724 Adept Systems Administrator with a proven track record at INSCOM, showcasing expertise in Active Directory and Linux systems. Demonstrates exceptional problem-solving abilities and a commitment to enhancing information security. Recognized for leading significant projects to successful completion, leveraging technical support skills and a collaborative approach to drive IT infrastructure advancements. System Administration Hardware Installation

Technical Support Troubleshooting & Resolution

Information Security Information Assurance

PKI Compliance Vulnerability Scanning

Linux Solaris

Threat Mitigation Windows

Active Directory NIPRNet

SIPRNet JWICS

BMC Remedy STAT Scanner

Servers, Workstations Server Racks

Satellite Communication Equipment VTC Equipment

Cabling Handheld Devices

Cloud Environments Microsoft Certified Solutions Associate: Windows Server 2012, 2019

CompTIA Security+ CE Army PKI Trusted Agent Training Certificate DEPO GM/EM Training Certificate Instructor Course Certificate A+ Certification Training Microsoft Windows 2000 Network Operating System Essentials Implementing Microsoft Windows 2000 Professional and Server

Managing a Microsoft Window Environment

INSCOM

Fort Belvoir January 2022 - Present

SYSTEMS ADMINISTRATOR 3

Managed NIPR, SIPR, and JWICS print servers and

network printer software and device installs on

three classification enclaves

Installed configured and maintained Active

Directory and third-party software utilities for

hardware systems within operational guidelines

Produced global enterprise-level designs for

secure Active Directory and Identity systems for

Monitored systems for vulnerabilities, tracked,

prioritized remediated or mitigated per policies

global initiatives

Strong knowledge of Active Directory design and

Group Policy, DNS, and DHCP

Discovered root cause analysis and problem

management for corporate Identity Management

environment

Lead projects through implementation via

collaboration with all IT, security and support

teams

Created and maintained system documentation for

domain technologies, including installation,

configuration, and appropriate troubleshooting

steps

Identified root cause of system issues through

research and refinement of existing documented

processes

Provided support for implementation,

troubleshooting and maintenance of IT systems

Managed IT system infrastructure and any

processes related to these systems

Conducted Tier 3 support to IT systems including

day-to-day operations, monitoring and problem

resolution for Active directory services

Provided support for the escalation and

communication of status to agency management

and internal customers

Provided support for the dispatch system and

hardware problems and remains involved in the

resolution process

Installed/loaded operating system and application

software

Integrated new technologies into new and existing

systems including the transition and migration of

corporate systems

Troubleshooted & repaired systems regarding

connectivity in a timely manner, 24/7/365 upon

receipt of mission, to include shift work along with weekend work as required.

Federated IT

Reston, VA, Washinton, DC, and Chantilly, VA March 2023 - September 2024 SYSTEMS ADMINISTRATOR IV

Updated XACTA records verifying ports, protocols,

and IP addresses, in preparation for Authorization to Operate Extension (ATOE) and CCRI inspections

Conducted and followed daily and weekly Systems

Administrator functions checklist in support of a

DIA mission, utilized Agile, Confluence, JIRA, and

Jenkins to assist engineers with portal rebuilds,

track new taskings, along with scheduling an

assigning future project while working toward

completion

Maintained NMRS & MASINT portal Virtual

Machines (Thin & Thic Client workstations, Servers

(Windows and Linux, utilizing Horizon VMWare,

Windows Server 2012 Expertise in configuration,

administration, and troubleshooting of Linux

CENTOS 7 and RHEL 6, 7

Installed Yum updates, SPLUNK forwarder, Trellix

6.7.9 (formerly McAfee), and Nessus agents updates from terminal, elevated privilege accounts.

SAIC

Laurel, MD February 2021 - October 2022

SYSTEMS ADMINISTRATOR

Provides Systems Administrator support to update,

maintain and repair Army National Guard

Processing, Exploitation and Dissemination (PED)

systems and enabling technologies to ensure all

systems are fully operational

Works with the Defense Information Security

Agency, the Ground Intelligence Support Activity,

and Trojan to install and maintain circuit

infrastructure

Maintains Converged Infrastructure/Distributed

PED (CI/DPED) systems (Thin clients, routers,

switches)

Maintains Federated PED (FPED) Systems (Thin

Clients, Routers, Switches, Servers (Windows,

Linux, Unix, &Solaris), Virtual Machines (VMWare)) Troubleshoots and repairs systems and

connectivity in a timely manner, 24/7/365 upon

receipt of mission, to include shift work and

weekends as required

Scanned systems for DISA STIG implementation by

utilizing tools SCAP tools

Experience with creation of standard operating

procedures within the intelligence communities.

Marathon TS

National Geospatial Intelligence Agency NGA Springfield, US August 2020 - March 2021 SENIOR SYSTEMS ADMINISTRATOR

Managed the functionality and efficiency of a

group of computers running on one or more

operating systems

Responsible for the operations, maintenance, and

monitoring of data center operations and

supporting infrastructure using Veritas, Element

manager Nagios, VM ware, Service Now, and BMC

Remedy ticket reporting systems

Between departmental applications.

Apex Systems

Pentagon 844th Communications Group AFNCR September 2019 - September 2020 SYSTEMS ADMINISTRATOR

Provide day-to-day system administration, to

include system and resource optimization by

utilizing Windows 2016 hypervisor to manage

physical and virtual servers

Provided screen shots to Cybersecurity team to

show proof of compliance with DISA Security

Technical Implementation Guide

Monitored, maintained, and managed server

activity

Requested ACAS remediation scans after manually

and remotely patching laptops, workstations, and

servers in accordance with ACAS scan result

recommendations

Implemented DISA STIGs based on Cybersecurity

teams' scans

Utilized STIG viewer along with SCAP tool to verify system hardening using Group Policy Editor,

Registry Editor, and GPOs.

General Dynamics Information Technology

Fort Meade, MD June 2019 - September 2019

SYSTEMS ADMINISTRATOR

Provide day-to-day system administration, to

include system and resource optimization, and

user assistance

Provide system configuration change and upgrade

recommendations

Monitor, maintain, and manage server activity and

compliance

Set up administrator and service accounts

Troubleshoot and resolve Linux/Windows desktop

or virtual (cloud) applications issues

Conduct system backups and recovery as well as

configuring, optimizing, monitoring operating

system software and hardware

Diagnose and repair hardware problems utilizing a

variety of testing tools and techniques.

Jacobs Engineering/United States Special Operations Command Crystal City, Virginia May 2018 - May 2019

SYSTEMS ADMINISTRATOR

Spearheaded support staff and ensured all

members followed standard procedures

Improved overall performance of organization by

keeping operating records of machine efficiency

and production reports

Delivered appropriate services through monitoring

of operation applications and storage devices

Streamlined system processes by conducting

system backups and recovery as well as

configuring, optimizing, monitoring operating

system software and hardware

Partnered with Linux/windows systems

engineering or applications programming

personnel to troubleshoot errors by maintaining

hierarchy of operations and change of instructions Ensured smooth flow of Data Center and Wide

Area Network operations through effective

strategies and active supervision.

Leidos/United States Army

The Pentagon, Arlington, Virginia April 2017 - April 2018 SENIOR SERVICE DESK SPECIALIST

Manage help desk providing technical support to

400+ end-users of non-classified, secret, and top

secret classified networks

Use Remedy to open, update, track, and close

trouble tickets on daily basis

Maintained Active Directory user accounts and

privileges, including creating, extending, deleting, or disabling accounts to prevent unauthorized

access to systems

Accountable for PKI Trusted Agent Certificate

Authority (CA) renewal, enrollment completion,

and revocation on top secret JWICS network

Provisioned enterprise email accounts on

classified/non-classified networks; updated

account information.

Criterion Systems/Air National Guard

Buzzards Bay, Massachusetts September 2016 - April 2017 HARDWARE SYSTEM ADMINISTRATOR

Administered, maintained, and supported critical

hardware, including troubleshooting and resolving

issues, reinstalling images, and correcting various errors

Complete weekly calibrations of weapons system

monitors and exported status report for

stakeholder review

Diligently monitored server rack LED status to

proactively identify hard drive issues and replaced drives on secret and top-secret machines.

United States Army

Augusta, Georgia January 2000 - September 2016

INSTRUCTOR

Conducted advanced information technology

training for 1,600+ students, as well as remedial

training as needed

Spearheaded maintenance, development, and

revision of course material to ensure students r

Proctored exams for Information Technology

Specialists, including new students, international students, and recertifying students.

United States Army

Deployment January 2000 - September 2016

AUTOMATIONS SPECIALIST

Evaluated new technology solutions to improve

reliability and scalability of automated processes. Assisted other team members in understanding

the principles behind process automation design

and implementation.

Created test plans, test scenarios, and test cases to validate system functionality prior to deployment. Provided support and troubleshooting assistance

for existing automation solutions in a 24, 7, 365

environment.

Monitored performance metrics on automated

processes to identify potential issues or

opportunities for optimization.

Documented all aspects of automation projects

including design considerations and

implementation details.

Resolved complex technical problems related to

automation solutions in a timely manner.

United States Army

Waegwan, Republic of Korea May 2008 - June 2009

GLOBAL BROADCAST SATELLITE TECHNICIAN

Operated, managed, and maintained sophisticated

equipment used to transmit large quantities of

data across private lines of communication.

Assisted with the training of new technicians as

needed.

Replaced faulty components within satellite

systems when necessary.

Monitored system performance after installation

for any potential issues or areas needing

improvement.

Entered codes needed to correct electronic

switching system programming.

Reviewed manufacturer's instructions, manuals,

technical specifications, building permits, and

ordinances to determine communication

equipment requirements and procedures.

Performed routine maintenance on equipment,

including adjusting and lubricating components

and painting worn and exposed areas.

Ensured that power supplies were adequate and

that communications links function.

Inspected equipment on regular basis to ensure

proper functioning.

Requested support from technical service centers

when on-site procedures failed to solve

installation or maintenance problems.

Drove crew trucks to and from work areas.

United States Army

Heidelberg & Wiesbaden, Germany

MANAGER, INFORMATION MANAGEMENT OFFICE

Served in multifaceted role supporting European

headquarters and end users across the continent

Installed software, performed troubleshooting, and implemented security policies on enterprise

domain

Set up and scheduled secret and non-secret video

conferences

Managed secure Blackberries, including installing

encryption scripts, opening phone lines, and

maintaining accountability for all telephone

devices.

EDUCATION

CERTIFICATIONS

CLEARANCE

REFERENCES

United

States Army

NATO Headquarters, Norfolk, Virginia

TECHNICAL CONTROL OPERATOR/NETWORK CABLE INSTALLER/HELP DESK TECHNICIAN Held position of trust responsible for installing, storing, and destroying cryptographic keys for top secret network devices

Installed patch panels, spliced fiber optic cable,

and terminated LAN cables.

United States Army

Fort Belvoir, Virginia

INFORMATION MANAGEMENT OFFICER

Implemented and enforced security policies and

procedures on secure and non-classified systems,

performed vulnerability scanning, and loaded

Information Assurance Vulnerability Alerts (IAVAs) for systems with identified vulnerabilities

Attended department meetings to review new or

forthcoming policies.

University of Maryland University College

COMPLETED COURSEWORK TOWARDS ASSOCIATE OF ARTS IN GENERAL STUDIES CompTIA Security+ CE MCSA Server 22012

Top Secret/SCI

References available upon request

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