Grzegorz Jezierski
Chief Specialist in the Monitoring and Network Operations Center Department at NetWorkS!- Claim this Profile
Click to upgrade to our gold package
for the full feature experience.
Topline Score
Bio
Credentials
-
Network Defense
CiscoOct, 2023- Oct, 2024 -
Powershell w bezpieczeństwie: podstawy, tricki, praktyka
SecuritumOct, 2023- Oct, 2024 -
Cyber Threat Management
CiscoSep, 2023- Oct, 2024 -
Narzędzia i techniki OSINT-owe
SecuritumSep, 2023- Oct, 2024 -
Nie daj się cyberzbójom! v4.0
SecuritumSep, 2023- Oct, 2024 -
Operowanie na bitach i bajtach - ciekawostki, tricki, PRAKTYKA
SecuritumSep, 2023- Oct, 2024 -
Poznaj bezpieczeństwo Windows. Część trzecia: tajniki Group Policy
SecuritumSep, 2023- Oct, 2024 -
Security First Online +4 pkt CPE
ComputerworldSep, 2023- Oct, 2024 -
Czy Pythonem można hackować wszystko?
SecuritumAug, 2023- Oct, 2024 -
Akademii Cyberbezpieczeństwa - Cisco SecUniversity
Cisco Networking AcademyJun, 2023- Oct, 2024 -
Hackowanie vs Sztuczna Inteligencja
SecuritumJun, 2023- Oct, 2024 -
Praktyczny OSSEC
SecuritumJun, 2023- Oct, 2024 -
First Incident Responder - Cyber Ratownik
Niebezpiecznik.plMay, 2023- Oct, 2024 -
Poznaj bezpieczeństwo Windows. Część druga: lokalne uwierzytelnianie i autoryzacja.
SecuritumMay, 2023- Oct, 2024 -
Dlaczego hackowanie sieci jest proste?
SecuritumApr, 2023- Oct, 2024 -
Praktyczny Wireshark
SecuritumApr, 2023- Oct, 2024 -
Poznaj bezpieczeństwo Windows. Część pierwsza: usługi systemowe.
SecuritumMar, 2023- Oct, 2024 -
RODO okiem hakera! Praktyczne szkolenie z ochrony danych osobowych.
SecuritumMar, 2023- Oct, 2024 -
Ransomware ESXiArgs i dobre praktyki ochrony środowisk wirtualnych VMware
SecuritumMar, 2023- Oct, 2024 -
Practical Malware Analysis & Triage
TCM SecurityFeb, 2023- Oct, 2024 -
5G System Overview
Sploty Sp. z o.o. [Ltd.]Jan, 2023- Oct, 2024 -
NSE 2 Network Security Associate
FortinetNov, 2022- Oct, 2024 -
Introduction to Cyber Security
TryHackMeOct, 2022- Oct, 2024 -
MITRE ATT&CK Defender™ (MAD) ATT&CK® SOC Assessments
CybraryOct, 2022- Oct, 2024 -
Foundations of Operationalizing MITRE ATT&CK
AttackIQSep, 2022- Oct, 2024 -
NSE 1 Network Security Associate
FortinetMay, 2022- Oct, 2024 -
Python Essentials 1
CiscoMay, 2022- Oct, 2024 -
Python od podstaw
Software Development AcademyMay, 2022- Oct, 2024 -
Web Fundamentals
TryHackMeMay, 2022- Oct, 2024 -
CompTIA Pentest+
TryHackMeApr, 2022- Oct, 2024 -
Complete Beginner
TryHackMeMar, 2022- Oct, 2024 -
Cybersecurity Essentials
CiscoMar, 2022- Oct, 2024 -
Identifying Web Attacks Through Logs
CybraryMar, 2022- Oct, 2024 -
Kali Linux Fundamentals
CybraryMar, 2022- Oct, 2024 -
Networking Essentials
CiscoMar, 2022- Oct, 2024 -
OSINT/OPSEC/analiza dezinformacji
SecuritumMar, 2022- Oct, 2024 -
Developing Ethical Hacking Tools with Python
CybraryFeb, 2022- Oct, 2024 -
Introduction to Cybersecurity
CiscoFeb, 2022- Oct, 2024 -
Penetration Testing and Ethical Hacking
CybraryFeb, 2022- Oct, 2024 -
Pre Security Learning Path
TryHackMeFeb, 2022- Oct, 2024 -
Web Application Penetration Testing
CybraryFeb, 2022- Oct, 2024 -
LTE Cellular IoT
Sploty Sp. z o.o. [Ltd.]Nov, 2020- Oct, 2024 -
OSINT
Niebezpiecznik.plSep, 2019- Oct, 2024 -
SS7 over IP (SIGTRAN)
Sploty Sp. z o.o. [Ltd.]Sep, 2019- Oct, 2024 -
Voice over WiFi
Sploty Sp. z o.o. [Ltd.]Dec, 2018- Oct, 2024 -
VoIP technology
LeliwaJun, 2017- Oct, 2024 -
PRINCE2® Foundation Certificate
PEOPLECERTDec, 2015- Oct, 2024
Experience
-
NetWorkS!
-
Poland
-
Telecommunications
-
200 - 300 Employee
-
Chief Specialist in the Monitoring and Network Operations Center Department
-
Jul 2023 - Present
- monitoring of 2G / 3G / 4G / 5G mobile telephony systems- basic configuration & Fault Management RAN Nokia 2G / 3G / 4G / 5G- basic configuration & Fault Management RAN Huawei 2G / 3G / 4G / 5G- integration, acceptance testing of new radio network components- locating failures and damages in supervised elements of the network and systems as well as their remote removal- maintenance and preventive operations on elements of the mobile network- analysis of quality statistics and movement trends on supervised elements- post-accidental failure analysis- registration and transfer of information on the network status to internal and external entities- cooperation with directly related departments and within tools and applications such as workflow, database, etc.- maintaining contacts with suppliers and operators in the maintenance and development of the RAN network- ensuring the quality of networks and services by verifying KPI statistics- communication with national and international operators of telecommunications networks- performing revoke of PKI certificates Show less
-
-
CERT/SOC Specialist T1
-
Jan 2023 - Present
- Triage, investigation and incident response to cyberthreats using Azure Sentinel- Monitoring and analyzing traffic events/alerts via Elastic SIEM tool- Analyze phishing or SPAM campaigns to gather all information, check outbound traffic to found IoCs, request containment actions, and notify victims- Analyzing potential malware infections by checking the results of the operation of EDR systems for malicious behavior and assessing the urgency of the actions to be taken.- Issues escalated to tier 2- Implementation of operational tasks of the Security Hardening process in the RAN domain (e.g. management and granting periodic access to suppliers for the purposes of the FM/CM process)- Monitoring the area of the RAN network and the access transmission network in terms of cyber security Show less
-
-
Senior Specialist in the Monitoring and Network Operations Center Department
-
Jul 2022 - Jun 2023
-
-
Specialist in the Monitoring and Network Operations Center Department
-
Jan 2016 - Jun 2022
-
-
-
Military University of Technology
-
Poland
-
Higher Education
-
400 - 500 Employee
-
Telecommunications Institute - Apprentice
-
Sep 2013 - Oct 2013
-
-
-
NetWorkS!
-
Poland
-
Telecommunications
-
200 - 300 Employee
-
Departament Operacyjnego Utrzymania i Zarządzania Sieci - Apprentice
-
Jul 2012 - Aug 2012
-
-
Education
-
Wojskowa Akademia Techniczna w Warszawie
Master of Science (MSc Eng.), Electronics and telecommunication -
Software Development Academy
Python from Scratch (280h) -
Politechnika Warszawska
Postgraduate studies, Project management: methodologies, practice, techniques, tools -
Wojskowa Akademia Techniczna w Warszawie
Engineer (Eng.), Electronics and telecommunication