Marin G.
Cyber Security Response Engineer @Jumpsec
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WORK HISTORY
Cyber Security Response Engineer @Jumpsec
Lead investigations across Microsoft Sentinel, Defender XDR, and Entra ID; handle credential theft, ClickFix, and infostealer incidents; use Defender Live Response to isolate hosts and block malicious hashes/domains.Build and tune KQL hunts (MFA fatigue, impossible travel, AV/EDR tamper, outbound C2) and promote high-signal hunts into analytics rules with suppression where needed.Triage identity and cloud risks (risky sign-ins, token anomalies) and drive hardening: ASR rules, application control, Conditional Access, MFA, baselines, and logging coverage.Communicate clearly with executive-ready summaries and JIRA updates; maintain a reusable KQL library; mentor junior colleagues; certifications: SC-300, SC-200, Security+; currently working toward AZ-500.
EDUCATION
University of Craiova
Agronomist engineer, Agriculture
ABOUT MARIN G.
I am a Cyber Security Response Engineer focused on the Microsoft cloud. I investigate and contain real attacks across multiple tenants using Microsoft Sentinel, Defender XDR, Entra ID and Azure.I spend most of my time threat hunting with KQL, digging into identity, endpoint and cloud telemetry to separate noise from real compromise and feeding what I learn back into better detections.Certifications: AZ-500, SC-300, SC-200, Security+.
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