Johnny Lemarquis

Cybersecurity Consultant | OSINT | OWASP | OpenSource

Mamer, Luxembourg, Luxembourg

www.johnnylemarquis.com

Experience

IT Security Officer - Banking & Financial Industry

Jan 2022 - Present •

Luxembourg, Luxembourg • Hybrid

Supervised data security and compliance with third parties, managing compliance infrastructure. Managed data loss prevention (DLP) solutions. Handled security incidents with SIEM tools and optimized threat detection. Managed vulnerabilities, privileged access, and firewall policies. Ensured container security and maintained knowledgeDatabase. Employed OSINT for advanced threat monitoring. Conducted risk assessments and enforced security policies. Utilized cloud security tools to secure cloud environments.

IT Security Specialist | Financial & Private Sector

Jul 2015 - Dec 2021 • 6 yrs 6 mos

Luxembourg • Hybrid

Delivered compliance security services per contract. Developed security policies and processes. Acted as primary support for IT compliance issues. Enhanced reporting and automated processes. Supported internal and customer audits.

Penetration Tester | Security Operations Center (SOC) - Financial Sector

Jul 2014 - Jul 2015 • 1 yr 1 mo

Luxembourg, Luxembourg • On-site

Conducted security audits and reported vulnerabilities. Managed vulnerability scanners and performed code reviews. Created test cases and installed SIEM. Monitored for vulnerabilities, managing incidents and SIEM alert.

Middleware Engineer | European Institution

May 2010 - Jul 2015 • 5 yrs 3 mos

Luxembourg, Luxembourg • On-site

Administered application servers on Unix platforms. Managed servers at LEVEL 2 support. Scheduled tasks, configured monitoring tools, and deployed scripts. Scripting for daily tasks and resolving production incidents.

Applications System Engineer | Unix/J2E | European Institution

Jul 2009 - May 2010 • 11 mos

Luxembourg, Luxembourg • On-site

Managed and installed J2EE Application Servers on Unix platforms. Executed development scripts on databases. Configured messaging queues and network communication.

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