Sarah Martinez
Baltimore,MD
Summary
Dedicated information technician with over 8 years of expertise in cybersecurity, system administration and IT operations. Focused and driven professional with a proven track record in developing and maintaining security standards. Skilled at troubleshooting, communication and collaboration. Active Top Secret/SCI Clearance with CI Poly.
Overview
8
8
years of professional experience
Work History
Lead System Engineer & Network Analyst
US NAVY- CYBER DEFENSE ACTIVITY-64
2020.03 - 2023.04
- Oversaw the installation and maintenance of team's deployable kit network architecture and infrastructure
- Experienced with advanced Deployment Mission Support Systems, to include Splunk SIEM and host collection tools
- Provided collection and system analytics covering in-depth IT architectures of over 3k+ endpoints and servers resulting in the collection of 300TB+ data
- Deployed with United States Marine Corps (USMC) Cyber Protection Team (CPT) in support of a named hunt forward operation (HFO) to provide network and infrastructure support
- Researched, developed, and reported findings of anomalous network activity
- Traveled worldwide to customer sites to perform defensive cyber operations, collaborated and coordinated with both the mission partner and the USMC CPT mission elements (MEs)
- Effectively used embedded intelligence support to corroborate findings and to determine event significance
- Liaised with rear element to support split-based operations (SBO)
- Responded to and submitted requests for information (RFIs)
- Engineered configuration and management of audit collection logs across multiple environments using security information and event management (SIEM) tools, to include Splunk and Elasticsearch
- Trained five personnel on installation, operation, configuration maintenance, and testing for team's kit and tool configuration covering multiple secure operating system enclaves
- As a Network Analyst, used network security tools like Wireshark, NMAP, Stenographer, and Splunk to identify adverse network trends, anomalous traffic, and potential emerging threats or malicious cyberspace activity
- Generated tickets and collaborated with other analyst resulting in the discovery of three malicious files attributed to an adversary Advanced Persistent Threat
- Balanced technical skills with applicable experience to provide advice, guidance and assistance on a wide range of complex cybersecurity issues
- Continually worked to identify threats, enhance interoperability and strengthen defensive cyber capabilities
- Conducted vulnerability assessment and penetration test, collaborating with international partners resulting in the enhancement of the Tactics, Techniques and Procedures (TTPs) profile of targeted Advanced Persistent Threats (APTs)
- Temporary Assigned to Cyber National Mission Force (CNMF) Battle Watch
- Maintained daily operational oversight over CNMF operations and served as single point for command and control to CNMF Commander
- Prepared daily briefs and mission reports for CNMF Commander regarding ongoing missions
- Led 8 joint-service members in the management of CNMF daily operations
- Managed 80 missions for joint-service teams spanning 5 Areas of Responsibility (AORs) across 3 geographically separated commands
- Streamlined troubleshooting processes to improve system support and enhance communication between support team and end-users.
- Continually research cybersecurity trends and novel attacks to incorporate and develop new methods of threat hunting.
- Completed software updates and assessed security patches for optimized computer use.
Communication Watch Officer (CWO)/ Assistant Information Security System Manager (A-ISSM)
US NAVY- USS MAHAN (DDG 72)
2015.09 - 2020.03
- Managed advance network architecture with multiple computer operating system (OS) platforms across the Department of Defense Information Network (DoDIN) infrastructure
- Experience with Windows, Linux and Windows Server 2008, 2012 and 2016.
- Conducted security audits on IT infrastructure and policies, including firewalls, access management, and user authentication to build risk mitigation and apply active defense system hardening protection measures
- Supervised seven personnel in the operation and maintenance of 50 servers, eight network switches, five routers, and 151 workstations
- Managed the completion of more than 7,000 hours of maintenance to reduce network issues and latency
- Secured and managed afloat network infrastructure, supporting over 300 users
- Ensured network security through the implementation of security tools and protocols.
- Completed software updates and assessed security patches for optimized network use.
- Managed response, triage, and escalation of cybersecurity incidents related to user access, security breaches, and user privacy and created documentation to minimize future issues
- Maintained accurate documentation of security events, incidents response activities, and network configuration management
- Provided yearly cyber awareness training and oversaw account management for Naval ship network
- Assisted in the information security training and awareness program
- Oversaw the installation of CANES during availability yard period and completed systems accreditation needed to reestablish authorization to operate (ATO)
- Lead IT division in successfully passing ship cyber security inspection.
Education
Associate of Science - Cybersecurity
Howard Community College, HCC
Columbia, MD12.2024
Bachelor of Arts - Civil Leadership, Psychology
The City College of New York, CUNY
New York, NY02.2014
Skills
- Defensive Cyber Operator
- Senior Job Qualification Record (JQR) Infrastructure
- Basic JQR Network Analyst
- Respected and reliable professional
- Experienced at accomplishing missions in joint environment
- Cyber Threat Emulation
- Active Directory
- Public Key Infrastructure
- Network Fundamentals including enumeration, topology, TCP/IP protocols
- Vulnerability Assessment
- Application Security
Professional Development
- Navy School: IT “A” School
- Navy School: System Administrator
- Navy School: Consolidated Afloat Networks and Enterprise Services (CANES) Administrator
- Navy Training: Intermediate Cyber Core
- Splunk Fundamentals 1 & 2
- Splunk Enterprise Cluster Administration
- Splunk Enterprise Data & System Administration
- Architecting Splunk Enterprise Deployments
Awards
- Recognized by the Cyber National Mission Force (CNMF) Commanding General, Major General Hartman, for HFO accomplishments.
- United States Navy & Marine Corps Achievement Medal (2018, 2020, 2022, 2023).
Timeline
Lead System Engineer & Network Analyst
US NAVY- CYBER DEFENSE ACTIVITY-64
2020.03 - 2023.04
Communication Watch Officer (CWO)/ Assistant Information Security System Manager (A-ISSM)
US NAVY- USS MAHAN (DDG 72)
2015.09 - 2020.03
Associate of Science - Cybersecurity
Howard Community College, HCC
Bachelor of Arts - Civil Leadership, Psychology
The City College of New York, CUNY
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