Тетяна

TETIANA ZHDANENKO
SOC Analyst (Tier 1) | Operational Security & Data Investigations
Heredia, Costa Rica | +506 7225-1169 | [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)
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GitHub: https://github.com/TanyaZhdanenko/cybersecurity-portfolio

PROFESSIONAL SUMMARY
Analytical and detail-oriented Investigation Professional with 7+ years of experience in Law
Enforcement, criminal inquiries, and data verification. Successfully transitioning investigative
expertise into corporate Cybersecurity as a Tier 1 SOC Analyst. Proven track record in analyzing
communication metadata (CDR), cross-verifying complex datasets to detect infrastructure
anomalies, and compiling legally bulletproof compliance reports. Fully available for 24/7 rotational
shifts, including night operations.

CORE SKILLS
● Security Operations (SOC): SIEM Concepts, Log Analysis, Traffic Monitoring, Event
Correlation, Alert Triage.
● Technical Foundations: Linux CLI, Windows Security & Administration, Python for
Automation, Network Defense.
● Data & Triage Analysis: Telecom Metadata Analysis (CDR), Pattern Recognition, Cross-
Verification, Root-Cause Analysis.
● Investigations: OSINT (Open Source Intelligence), Evidence Gathering, Threat Identification,
Advanced Technical Reporting.

CYBERSECURITY PROJECTS & HANDS-ON LABS
Local Security Monitoring Lab & Automation Portfolio | Independent Practice
● Virtual Environment Deployment: Engineered an isolated corporate network simulation
inside VirtualBox to analyze adversarial attack paths safely without host system exposure.
● Endpoint Telemetry Architecture: Deployed Kali Linux for multi-vector threat simulation;
hardened Windows and Linux endpoints by implementing advanced Sysmon auditing policies
for event logging.
● SIEM Infrastructure: Deployed and tuned an open-source SIEM solution (Wazuh) to handle
log aggregation, field normalization, and alert threshold optimization for server event
streams.

● Security Automation: Developed functional Python automation tools (re, os modules) to
parse raw unstructured log data, automatically extracting Indicators of Compromise (IoCs)
and dynamically updating firewall allow-lists (update_allow_list.py).

PROFESSIONAL EXPERIENCE
Managing Director / Operations & Risk Management | Retail Sector, Costa Rica | 2019 – 2024
● Managed operational risk landscapes, executed strict internal financial auditing, and enforced
corporate compliance regulations.
● Supervised data integrity and access control mapping for commercial data management
platforms.
Internal Investigations Officer | National Police of Ukraine | 2017 – 2019
● Led internal security and policy compliance investigations regarding unauthorized data
modifications, system abuse, and network protocol breaches.
● Processed forensic background audits, cross-examined digital tracking metrics, and
structured data-driven incident reports for senior executives.
Criminal Investigator | National Police of Ukraine | 2012 – 2017
● Directed comprehensive criminal inquiries, preserved the chain of custody for digital and
physical evidence, and performed root-cause incident analysis.
● Data Analysis: Parsed and analyzed voluminous telecom datasets, Call Detail Records
(CDRs), and subscriber traffic logs; collaborated with technical units to map anomalous
communication signatures.
● Utilized specialized OSINT frameworks and verification workflows to reconstruct
chronological incident timelines.

CERTIFICATIONS & TRAINING
● Google Cybersecurity Professional Certificate | Coursera | 2026
Core Focus: Network Security, Python Automation, SQL Database Auditing, and the NIST
Incident Response Lifecycle.
● Cybersecurity Interactive Training | TryHackMe | 2025 – 2026
Completed Pathways: SOC Analyst Tier 1, Windows/Linux Architecture, Threat Hunting, and
Cryptography Basics.

EDUCATION
Dnipropetrovsk State University of Internal Affairs | Ukraine
● Degree: Specialist in Law (Equivalent to Master's / LL.B. in Legal Studies) | Graduated: 2011

LANGUAGES

● English: Intermediate (B1/B2 – Professional working proficiency, actively improving for
corporate technical environments).
● Russian: Fluent.
● Ukrainian: Native.
● Spanish: Basic (A1/A2 – Actively learning for local integration).