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Sergiu TarnoveanST

Sergiu Tarnovean

IT Security Administrator

€301/day
Düsseldorf, DE
3-7 years

Average response time: 1 hour

About Sergiu

With a strong foundation in IT operations and a passion for cybersecurity, I am dedicated to safeguarding digital environments from ever-evolving threats. My career began in IT command center operations, where I honed my skills in system monitoring, incident response, and multi-platform environments. Transitioning into cybersecurity, I leverage my expertise in threat detection, network security, and incident response using industry-standard tools like Wireshark, Snort, Splunk, and Metasploit.

At Kyndryl and IBM, I played a pivotal role in ensuring high system availability (96.9% uptime), reducing operational risks, and streamlining security processes. My proactive approach led to enhanced incident resolution and more efficient team workflows.

I hold multiple certifications, including CompTIA Security+ (2025), Microsoft Azure Fundamentals, Google certifications and am actively upskilling through a Cybersecurity program at Masterschool. My mission is to bridge security gaps, implement proactive defense strategies, and contribute to a safer digital world.
  • French

    Native or bilingual

  • Romanian

    Native or bilingual

  • English

    Fluent

  • Spanish

    Conversational

  • Italian

    Conversational

  • German

    Basic

  • Portuguese

    Conversational

  • Czech

    Basic

Can work on-site
Düsseldorf (up to 50km)

Experience

  • Kyndryl
    Business Applications Support Specialist
    December 2018 - July 2024 (5 years and 7 months)
    Brno, Czechia
    Ensured 96.9% uptime for business-critical applications across production, pre-production, and integration environments.
    Reduced operational issues by 15% via proactive monitoring across multi-platform systems (Linux, Unix, AIX, Windows). Resolved 35+ technical incidents monthly; documented solutions to support data-driven improvements. Streamlined 78+ SOPs, improving onboarding speed and reducing error rates in routine tasks by 19%.
    Standardized and updated over 78 operating procedures, improving team onboarding speed and reducing error rates in routine tasks by 19%.
  • IBM Global Services Delivery Center,
    Shift Leader IT Command Center
    February 2017 - December 2018 (1 year and 10 months)
    Brno, JM, Czechia
    Led an 8-member team to coordinate daily tasks and ensure timely incident resolution.
    Developed and implemented comprehensive training programs, reducing onboarding time and enhancing team efficiency.
    Improved team communication and task allocation through structured workflows, increasing transparency and reducing errors.
  • IBM Global Services Delivery Center,
    IT Command Center Specialist
    September 2014 - February 2017 (2 years and 5 months)
    Brno, JM, Czechia
    Managed and monitored complex multi-vendor systems, ensuring network and application performance.
    Analyzed and resolved critical UNIX and Windows issues, improving system efficiency by 15% and reducing error rates by 20%.

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Education

  • Certificate Microsoft Certified: Azure Fundamentals
    2023
    Certificate Microsoft Certified: Azure Fundamentals
  • Training Program
    2025
    Training Program

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