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Andrejus S

About me

An experienced Senior SOC Security Analyst with over 20 years in cybersecurity, IT infrastructure, and network protection. He has worked across government institutions and leading cybersecurity companies, specializing in SIEM, IDS/IPS, vulnerability assessments, incident response, and industrial control system security. Andrejus holds a Master’s degree in Information and IT Security from Kaunas University of Technology and multiple international certifications including GIAC GCIH, ISA/IEC 62443 CFS, and OT Security Expert (OPSWAT). He is highly skilled in tools such as ArcSight, Kibana, Nessus, SentinelOne, and Hunters, and is fluent in English and Russian, with A2 German skills.

Experience

Seniority LevelMid-Senior level
Years of Experience10-15 years
Current StatusActive

Certification

Total Certifications11

OT Security Expert, OPSWAT Academy, Valid until October 2025

Claroty CyberSecurity Analyst (CCA 601), Claroty, Valid until September 2026

Purple AI Pre-Sales Applied Certification, SentinelOne, Valid until June 2025

Hunters Certification: Technical Foundations, Hunters, Valid until June 2030

ISA/IEC 62443 Cybersecurity Fundamentals Specialist (CFS), International Society of Automation (ISA), Valid until May 2026

GIAC Certified Incident Handler (GCIH), Global Information Assurance Certification (GIAC), Valid until August 2027, Analyst Number: 46304

Tenable.sc Scanning and Analysis Certification, Tenable.io University, Awarded June 2020

Tenable.io Sensor Deployment Certification, Tenable.io University, Awarded June 2020

Microsoft Certified Professional (MCP), Microsoft (Exams: 070-215; 070-224; 070-270), No expiration date, MCP ID: 2864907

ITIL Foundation Certificate, EXIN, No expiration date, Certificate ID: 4422068.1048294 / 00103449

GateProtect Certified Security Professional, Rohde & Schwarz Cybersecurity GmbH (formerly GateProtect), No expiration date

Skills

Core skills40
Languages2

Skills

Cybersecurity
SOC Operations (Tier 2 and Tier 3 analysis)
SIEM management and optimization (ArcSight ESM, OSSIM, RAIN SIEM, Kibana, Qradar)
Threat detection, investigation, and incident response
Vulnerability Assessment and Management (VAS)
Penetration testing and security auditing
IDS/IPS management and tuning (SNORT, FireEye, SentinelOne, Hunters)
Industrial Control Systems (ICS) security analysis
Network security monitoring (IDS, IPS, Firewall, VPN, DNS, DHCP)
LAN/WAN infrastructure planning and management
VMware virtualization environments
Microsoft Active Directory
Windows Server (2003-2019)
UNIX/Linux system administration (RedHat, Ubuntu, FreeBSD)
ArcSight ESM
AlienVault OSSIM
RAIN SIEM
Kibana
Nessus
Tenable.io
SentinelOne
Hunters
Snowflake
Jira
Confluence (project management, dashboards, analytics)
Security frameworks: ISO 27001, NIST, OWASP
ITIL principles
Risk assessment methodologies
Electronic document management
Data protection regulations (GDPR-related)
English (Fluent - C1)
Russian (Fluent - C2)
German (Basic - A2)
Communication skills
Presentation skills
Analytical skills
Structured problem-solving
Leadership
Project management
Team collaboration

Languages

English (British)
English

Services