Looking for a job

Mariia Holovko

@mariiaholovko

Message

I investigate and resolve high-volume security incidents across phishing, endpoint, and email environments.

United Kingdom

Message

What I'm looking for

I'm looking to contribute to a global 24/7 security operations function in a regulated financial services environment, applying incident triage, threat investigation, and detection improvement while continuing to grow in cybersecurity and threat analysis.

At Ironscales, I monitor, triage, and resolve 450+ security incidents each week with 97% classification accuracy. I investigate phishing campaigns, malicious attachments, impersonation attempts, and account compromise cases across endpoint and email environments.

I manage incident response from detection through containment and documentation, improve detection logic by identifying false positives, and collaborate with distributed security teams. I also built an adaptive Python intrusion detection prototype that reduced false negatives by 30% on the NSL-KDD dataset.

Experience

Work history, roles, and key accomplishments

Security Analyst (SOC)

Ironscales

Mar 2025 - Aug 2026 (1 year 5 months)

Monitored, triaged, and resolved 450+ security incidents per week with 97% classification accuracy. Investigated phishing, malware, and account compromise cases, and managed the full incident response lifecycle.

Incident Response SIEM Log Analysis Phishing Analysis Malware Analysis Threat Hunting Detection Tuning Microsoft Sentinel Microsoft Defender Python SQL

Data Labeling Specialist

Splendid Score

May 2024 - Feb 2025 (9 months)

Processed and annotated large-scale datasets for machine learning security models, performing data validation, quality control, and anomaly identification.

Data Annotation Data Validation Quality Control Anomaly Detection Python SQL