Mark S. Email & Phone Number

Experienced Infrastructure Engineer and Cyber Security specialist with a proven track record in incident management, automation, monitoring and cryptography engineering. I have a strong foundation in cybersecurity principles and am skilled in a variety of scripting languages and technologies. I am competent in managing both Linux and Windows systems with some additional experience in MacOS administration. I am always trying to work in Agile manner and I have previously received a SAFe certification. Due to being passionate about cybersecurity, I actively participate in Cyber Security competitions such as NATO Locked Shields and various Capture The Flag (CTF) events to continuously hone my skills.Previous experience includes:- Management and lifecycle of various cryptography related services: Public Key Infrustructure (PKI), Hardware Security Modules (HSMs).- Development of scripts in PowerShell, Bash/Shell, and Python for various automation tasks.- Set up automation and monitoring systems using Zabbix and Grafana.- Management and responding to incidents as part of a 24/7 On-Call, ensuring minimal downtime and quick resolutions.- Implementing Change Control for critical infrastructure (Log Management, File Integrity Monitoring, ).- Administration of Active Directory (AD) and domain infrastructure.- Management of Windows and Linux servers on a daily basis.- Implementation of Multi-Factor Authentication on a MacOS.- Developing applications on: C#, Java, NodeJS.- Working with many other technologies, such as: different Azure components, Ansible, Jinja, Docker, YARA, Git and SQL.Previous Participations:- NATO Cooperative Cyber Defence Center of Excellence (CCDCOE): Locked Shields 2024- Cyber Battle of Estonia 2021- CTF Magic 2020- CTF Pärnu 2019- CyberCompetition CTF Game of Thrones 2018