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Rajesh BiswalRB
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Rajesh Biswal

@rajeshbiswal

I tune SIEM detections, investigate threats, and reduce false positives across enterprise SOC environments.

India
Message

At Comtel Infosystems, I monitor 120–180+ daily security alerts, investigate incidents across Windows and Linux, and contain threats using CrowdStrike Falcon, SentinelOne, and FortiGate Firewall.

I've reduced false positives by 30% through alert tuning, threshold adjustments, and SIEM correlation-rule optimization. I also hunt for lateral movement and privilege misuse by mapping SIEM queries to MITRE ATT&CK techniques.

I build practical security automation, including Python tools for bulk IOC enrichment and phone-number intelligence. My work combines Elastic SIEM, threat intelligence, vulnerability assessment, incident response, and digital forensics.

Experience

Work history, roles, and key accomplishments

CL
Current

Cybersecurity Analyst - SOC

Comtel Infosystems Pvt. Ltd.

Jan 2025 - Present (1 year 8 months)

Monitored and analyzed 120-180+ security alerts daily using Elastic SIEM and ManageEngine EventLog Analyzer. Reduced false positives by 30% through alert tuning and detection rule optimization, and handled incident response across Windows and Linux systems.

DI

Security Data Analyst

360DigiTMG

Jul 2024 - Dec 2024 (5 months)

Performed data analysis using Python and SQL to support security metrics and reporting.

Education

Degrees, certifications, and relevant coursework

Centurion University logoCU

Centurion University

Bachelor of Technology, Computer Science Engineering (Cybersecurity & Digital Forensics)

2019 - 2023

Grade: 8.03/10

Pursued a Bachelor of Technology in Computer Science Engineering with a specialization in Cybersecurity and Digital Forensics, achieving a CGPA of 8.03 out of 10.

Cisco logoCI

Cisco

Endpoint Security, Endpoint Security

Completed the Endpoint Security certification from Cisco, focusing on securing endpoints against threats.

Cisco logoCI

Cisco

Cisco Cybersecurity Certification, Cybersecurity

Earned the Cisco Cybersecurity Certification, demonstrating knowledge in cybersecurity fundamentals and practices.

Google logoGO

Google

Google Cybersecurity, Cybersecurity

Completed the Google Cybersecurity certification, covering foundational cybersecurity concepts and practices.

State University of New York logoSY

State University of New York

Data Analytics, Data Analytics

Completed a Data Analytics certification from the State University of New York, focusing on data analysis techniques and tools.

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