CHRISTOS VASILEIADIS
Athens
Summary
Experienced SOC Analyst with a strong background in network security and a degree in Computer Engineering from the University of Patras. Skilled in monitoring and safeguarding corporate networks against cyber threats using advanced SIEM/SOAR technologies. Collaborative team player adept at aligning cybersecurity initiatives with business objectives and ensuring compliance with industry standards and regulations. Passionate about continuously learning new skills and best practices to stay ahead of evolving threats and provide proactive solutions. Seeking opportunities to apply expertise and make a significant impact in the field of cybersecurity. Let's connect and explore potential collaborations if you require a dedicated cybersecurity engineer with expertise in network security and SIEM/SOAR.
Overview
7
7
years of professional experience
1
1
Certification
Work History
L2 Cybersecurity Analyst
CBSLAN
10.2024 - Current
- Lead Investigations on Complex Offenses: Spearheaded and led in-depth investigations into complex security offenses, analyzing attack vectors, and identifying the root cause. Provided detailed guidance to junior analysts and assisted in incident response to mitigate ongoing threats and prevent recurrence.
- Threat Intelligence Automation: Automated the ingestion of Threat Intelligence Data (IoCs) into the SIEM, significantly enhancing the speed and precision of threat detection and alerting. Integrated multiple threat feeds, enabling proactive security measures against emerging threats.
- Detection Rule Implementation & Review: Designed and implemented custom detection rules to address specific threats, while continuously reviewing and optimizing legacy rules. Collaborated with the team to fine-tune detection capabilities, improving detection rates and reducing false positives.
- Security Advisory Reports: Authored comprehensive security advisory reports, detailing the latest critical CVEs, vulnerabilities, and associated risks.
- High Severity Incident Handling: Took ownership of high-priority and escalated incidents, ensuring rapid investigation and resolution.
- Risk Analysis & Countermeasure Implementation: Conducted detailed risk assessments, identifying vulnerabilities in the organization’s systems and network. Worked closely with IT and security teams to recommend and implement effective countermeasures.
- Training & Knowledge Sharing: Provided training sessions to junior SOC analysts on handling specific security threats, using SIEM effectively, and responding to incidents. Promoted a culture of continuous learning and improvement within the team.
- Continuous Monitoring & Improvement: Monitored security dashboards and alerts in real-time to proactively identify potential threats, and continuously adjusted monitoring systems to better detect sophisticated attacks.
Team Leader - Innovation Team
Odyssey Cybersecurity
01.2023 - 10.2024
- Customize correlation rules for multiple customers' specific needs
- Create correlation rules for detecting cybersecurity threats and vulnerabilities
- Support integration of new technologies for SIEM platforms
- Analyze raw logs and develop parsing patterns for new log sources
- Normalize fields across existing and new log sources
- Provide feedback on correlation rules and internal procedures to improve service delivery
- Evaluate and propose enhancements for SIEM platform functionality
- Leveraging MITRE att&ck for detecting and mitigating cyber threats
SOC Analyst LvL 2
Odyssey Cybersecurity
10.2023 - 04.2024
- Conduct real-time monitoring of cyber defense, intrusion detection, and behavior analysis systems
- Perform investigation and analysis of suspicious activities and correlated events
- Classify events, incidents, and vulnerabilities according to their significance, exposure, impact, and severity
- Offer guidance and support to Level 1 Cybersecurity Analysts
- Lead investigations, oversee multitasking, and assign tasks based on resource availability
Security Operations Center Analyst LvL 1
Obrela Security Industries
07.2022 - 10.2023
- Monitored and analyzed security events using QRadar SIEM, identifying potential threats and anomalies in real-time
- Conducted thorough endpoint detection and response – EDR investigations using CrowdStrike and Carbon Black, identifying and mitigating security incidents
- Utilized Microsoft Advanced Threat Protection – ATP for advanced threat hunting and response, enhancing the security posture of the organization
- Performed initial triage and incident analysis, escalating critical events to higher-level SOC analysts as needed
- Consistently met and exceeded Service Level Agreements – SLAs for incident detection, response, and resolution, ensuring timely and effective mitigation of security threats
Military Duty
Greek Army
01.2020 - 12.2021
Support Engineer
Kotopoula Artas
01.2018 - 12.2020
- Provided expert network troubleshooting support, resolving connectivity issues and ensuring optimal network performance for end-users
- Assisted in the maintenance and support of ERP systems, addressing user queries and issues to ensure smooth business operations
Education
M.D. - Computer Engineer And Informatics
University of Patras
Patra Greece12.2020
Skills
- Attention to detail
- Threat hunting
- Network security
- Security analysis
- Analytical thinking
- Security monitoring
- EDR Knowledge (Microsoft,Cisco,Panda,ESET,Crowdstrike,Fortinet etc)
- SIEM (Qradar,Sentinel,Splunk,Elastic)
- Scripting
- Effective Communication
Languages
Greek
English
Certification
- CySA+
- Certified Network Security Practitioner (CNSP)
- Foundations of Operationalizing MITRE ATT&CK v13
- Top ATT&CK Techniques
- MITRE ATT&CK Security Stack Mappings: Azure
Timeline
L2 Cybersecurity Analyst
CBSLAN
10.2024 - Current
SOC Analyst LvL 2
Odyssey Cybersecurity
10.2023 - 04.2024
Team Leader - Innovation Team
Odyssey Cybersecurity
01.2023 - 10.2024
Security Operations Center Analyst LvL 1
Obrela Security Industries
07.2022 - 10.2023
Military Duty
Greek Army
01.2020 - 12.2021
Support Engineer
Kotopoula Artas
01.2018 - 12.2020
M.D. - Computer Engineer And Informatics
University of Patras
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