Tamika Brown
Summary
Experienced Senior Systems Administrator with a proven track record of providing comprehensive support to the Intel community and FBI. With over 19 years of hands-on experience in managing complex IT infrastructures, I bring a deep understanding of both technical systems and the unique operational needs of government agencies. My expertise encompasses all aspects of system administration, from network management and security to hardware support and user training. Throughout my career, I have demonstrated proficiency in troubleshooting diverse technical issues, ensuring system reliability, and implementing innovative solutions to enhance operational efficiency. My background in supporting mission-critical operations within sensitive environments has equipped me with the skills necessary to excel in demanding and high-pressure situations.
Overview
10
10
years of professional experience
1
1
Certification
Work History
System Administrator/Vulnerability Analyst
Cognito Cyber Group
Herndon , VA
08.2023 - Current
- Lead help desk support all that includes using Service Now troubleshooting, diagnosing and resolving Tier 1 and 2 issues on/off site.
- Assited in development, security, operations and maintenance of the Insider Threat Network/System/Software information technology and database systems
- Provided solutions to recommendations for security issues and vulnerabilities identified during assessments
- Managed ticket system, routing to the appropriate groups, working to close helpdesk level 1 and level 2 tickets; example utilizing ServiceNow.
- Accomplished and documented all activities with data transfers; example SafeCon
- Maintained and restored VM backups and snapshots. Domain Administers role-based accesses to all internal enclaves.
- Performed regular backup operations and assist with the data protection, disaster recovery and failover procedures
- Managed user accounts spanning across several domains in multiple locations.
- Experience with hardening Windows environments
- Managed security across the network by deploying new security patches and browser updates for workstations and servers. Ensures policies and monitoring activity for signs of intrusion or compromise.
- Responded to Splunker requests for security assistance and identify/notify the appropriate partner to complete the request
- Provided timely notification to partners of potential security threats
- Participated in Safety & Security incident response by notifying the incident commander, creating a forum for all partners to communicate, providing timely incident updates, and documenting the incident in the system of record.
- Maintain daily duty log and conduct and record various checks and verification
PROPRIETARY SYSTEMS SPECIALIST 3 Tier II
CACI International
Alexandria, VA
04.2017 - 07.2024
- Served as the primary point of customer contact on ticket and issue follow up via phone using Cisco Call Agent.
- Provided operational support and software troubleshooting for Tier 1/II service desk to insure reliable and efficient resolution to critical issues.
- Documented and recorded all activity and communication with customers over telephone and email using Heat Call Logging System and Heat Ticketing Alert Monitor.
- Created new user RSA Security accounts and assign new RSA tokens and key fobs, reset RSA Pins and synchronized RSA tokens using RSA Authentication
- Maintained and deployed Windows desktop images across multiple networks
- Maintained and deployed Linux images via kickstart across multiple networks
- Deploys and manage both classified and unclassified desktop hardware
- Provides General IT support to the Beethoven operations and engineering team
- Utilize Active Directory and CA Provisioning Manager to created accounts, disable accounts, manage user’s (new, current and departed) accounts, groups, OUs, ACLs and Exchange accounts, reset users network logins, delete and add new and current machines back to the domain and to their respective OU, managed access to various group memberships, network shares and resources, moved user account and computers to various containers and OU
VDI Ops(Citrix)/ Mobikey Tier 3
Leidos
Washignton, DC
07.2020 - 08.2023
- Proficient using Microsoft Windows Sever 2016 & ESXI version 6.7 ( VM version 14)
- Monitored virtual machines to ensure availability
- Built and documented baseline security authorized VMware configs to meet security compliance specifications
- Monitored security patches and perform upgrades to VMware systems as required by security
- Configuration, maintenance, monitoring, and overall support of multiple VMware environments
- Setup, instaledl, configured, and triage ESXi hosts
- Maintained and restored VM backups and snapshots
- Performed system monitoring, analyzing, documenting performance, and conducting trend analysis
- Developed technical documentation, including SOPs, user guides, disaster recovery, and failover
- Managed virtual infrastructure that provides VDI capabilities to the various networks under customers domain
- Used Citrix to maintain and manage citrix applications
- Used Citrix Infrastructure servers to test/perform monthly/periodic security patching
- Proactively performed routine maintenance for Mx Molding VMs
- Performed periodic backups of VCenter
- Troubleshooted unregistered desktops and auto-maintenance mode desktops
- Proficient with using Service Central ticket system to manage ticket queue daily
- Assisted with updating as-built documentation as required.
- Installed updated infrastructure licenses
- Proficient with using Microsoft SQL to perform system database failovers and troubleshoot any/all server related issues.
- Used PowerShell scripts to push patches using proper scripts to the servers at proper time.
Mobikey Tier 3
Leidos
Washington, DC
07.2020 - 08.2023
- Used RDP (Remote Command) to log into hosts and troubleshoot Mobikey agent
- Served as the primary point of customer contact on ticket issues that involved troubleshooting host connection
- Communicated with customers and teammates clearly, concisely, and professionally
- Created administratored and serviced accounts using Active Directory
- Performed content administration, including sites and site configuration on SharePoint site for mobile phones
- Recorded, track and document all incidents and trouble tickets in ticketing service platform using Service Central
- Utilized PowerShell to find useful information to troubleshoot Mobikey issues without actually getting onto the system.
- Used PowerShell to locate Mobikey Client Version, MobiHost Service Status, Overall check WMI health Check.
Global Security Operation Monitor
Constellius
Herndon , VA
11.2014 - 07.2022
- Provided timely notification to partners of potential security threats
- Maintained daily duty log and conduct and record various checks and verification.
- Participated in Safety & Security incident response by notifying the incident commander creating a forum for all partners to communicate providing timely incident updates, and documenting the incident in the system of record
- Actively monitored alarms and video equipment to include door alarms, duress buttons, intercoms, and CCTV
- Responded to Splunker requests for security assistance and identify/notify the appropriate partner to complete the request
Senior System Administrator
GDiT
Tysons Corner, VA
07.2019 - 11.2020
- Worked independently to troubleshoot, and resolve cyber security incidents involving Tier-2 monitoring and sustainment of Windows and Linux
- Installed, configures, upgrades and maintains end user laptop devices and user access rights per corporate standards.
- Performed and insures backups of all network servers and critical user data for laptop devices.
- Provided SharePoint technical support through the preparation of briefings, technical review/status reports, attending Technical Design Reviews, and other applicable program meetings.
- Performed content administration, including sites and site collection creation and configuration, security model design and implementation, permissions management for SharePoint users, groups, sites, site collections, libraries, and lists
- Applied diagnostic utilities to aid in troubleshooting on laptop devices and mobile phone devices.
- Recorded, tracked and documented the ESMT (BMC) ticketing service request problem-solving process, including all successful and unsuccessful decisions made, and actions taken, through to final resolution.
- Provided technical support for all mobile device issues via our ticketing system, telephone, email, and in-person.
- Managed users and ensured user data is accurate in the MDM solution (Air watch).
- Created administrator and service accounts
- Performed upgrading technical support for operating systems and design of systems enhancements.
- Developed and implemented testing strategies and document results to leadership
System Administrator/Mission Support
GDiT
McLean, VA
11.2019 - 10.2020
- Provide software support to include remote and at-the desk installation troubleshooting and remediation of end-user software requests in a customer service oriented, team environment.
- Lead installation, troubleshooting and demolition actions required by internal and external agencies and work with vendors/original manufacturers for additional support needed.
- Monitor, open, assign, update and close tickets on up to 4 separate ticketing systems
- Install desktop software
- Provide desktop support at the customer's location as required, such as adding workstations to the domain, troubleshooting hardware issues, installing drivers; desktop support includes Windows and Red Hat Linux workstations and mobile computing (i.e. laptops and tablets)
- Physically or remotely log into the system and execute prepackaged Microsoft Installers (MSIs) or follow prescribed flowcharts/checklists
- Serve as the primary point of customer contact on ticket and issue follow up via phone using Cisco Call Agent.
- Provide operational support and software troubleshooting for Tier 1/II service desk to insure reliable and efficient resolution to critical issues.
- Document and record all activity and communication with customers over telephone and email using Heat Call Logging System and Heat Ticketing Alert Monitor.
Information System Security Officer
FBI Headquarters
Washignton , DC
09.2016 - 04.2017
- Ensured that assigned information systems are operated, maintained and disposed of in accordance with approved security policies and practices.
- Ensure that system security requirements are addressed during all phases of the IS lifecycle.
- Develop and maintain the SSPs and all other system security documentation, reviewing and updating them at least annually for all assigned systems.
- Supported risk assessment and evolution activities throughout the system's lifecycle.
- Implemented strategy for continuous monitoring for assigned systems including: Establishing system audit trails and ensuring their review, reporting all identified security findings and initiating the periodic review of security controls
- Requested and conducted required information system vulnerability scans in accordance to establish policy; Develop system POA&Ms in response to reported vulnerabilities.
- Assessesed and mitigated system security threats/risks throughout the program life cycle
- Developed and administered risk assessments and reviews for audits, IT projects and applications utilizing FISMA, Personnel Security, in-house and external risk matrices.
- Prepared comprehensive reports for senior management
- Developed and implemented coordination meetings with internal and external audit teams to influence shared vision.
Education
High School Diploma -
Forestville Military Academy
Forestville, MD05-2005
Skills
- Technical Proficiency
- Data-Driven Decision-Making
- Network Troubleshooting
- Operating System Proficiency
- Analytical Thinking
- Technical Analysis
- Technical Reporting
- Problem Resolution
- Customer Service
- Organization
- Communication
- Research
- Problem Resolution
- Time Management
- Interpersonal Communication
- System Integration
- Technical Analysis
- Technical Reporting
- Data-Driven Decision-Making
- Workflow Planning
- Continuous Improvement
- Team building
Accomplishments
- Performance Award, 4/2015
- Special Contribution Award, 9/2009
- Special Contribution Award, 7/2009
- Performance Award, 05/2017
Certification
- CCNA
- Security+ ce
- SECURITY CLEARANCE: ACTIVE, TS/SCI with Lifestyle Polygraph
Timeline
System Administrator/Vulnerability Analyst
Cognito Cyber Group
08.2023 - Current
VDI Ops(Citrix)/ Mobikey Tier 3
Leidos
07.2020 - 08.2023
Mobikey Tier 3
Leidos
07.2020 - 08.2023
System Administrator/Mission Support
GDiT
11.2019 - 10.2020
Senior System Administrator
GDiT
07.2019 - 11.2020
PROPRIETARY SYSTEMS SPECIALIST 3 Tier II
CACI International
04.2017 - 07.2024
Information System Security Officer
FBI Headquarters
09.2016 - 04.2017
Global Security Operation Monitor
Constellius
11.2014 - 07.2022
High School Diploma -
Forestville Military Academy
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