Oluwajuwon Olisa
@oluwajuwonolisa
I’m a cybersecurity-focused Information Security Analyst delivering actionable detection, response, and risk reduction.
What I'm looking for
I’m a cybersecurity professional with hands-on experience across both blue team and red team disciplines, focused on securing networks, systems, applications, and cloud environments against evolving threats.
In my current role as an Information Security Analyst (Remote, United Kingdom), I lead security monitoring improvements through holistic SIEM log and alert fine-tuning, vulnerability assessments across enterprise assets, and strengthening email security controls using SPF, DKIM, and DMARC.
I proactively detect and respond to threats through incident investigation and investigation workflows aligned with NIST SP 800-61, including daily dark web monitoring, phishing analysis, DLP and EDR policy implementation, and detection rules/playbooks across SIEM, EDR, and DLP platforms.
I also drive security assurance through cloud security assessments, WAF optimization, regulatory compliance ownership (ISO 27001 and PCI-DSS), and automation of security workflows using n8n—turning threat intelligence and operational insights into measurable improvements.
Experience
Work history, roles, and key accomplishments
Led SIEM-integrated log and alert monitoring enhancements through a team of analysts and interns, and performed vulnerability assessments to remediate weaknesses before exploitation. Managed detection engineering, DLP/EDR policy enforcement, social engineering and dark web monitoring, cloud security assessments, and web application firewall optimization.
Performed daily security alert triage and incident investigation, escalation, and reporting for events impacting critical systems. Conducted threat hunting with Microsoft Sentinel using KQL and supported phishing analysis, DLP monitoring, dark web monitoring, vulnerability assessments, and VPN access management.
Monitored the dark web for potential sensitive data leaks and supported endpoint and SIEM monitoring. Conducted initial security incident triage and analyzed phishing and DLP alerts to support containment and response.
Software Engineering Intern
AltSchool Africa
Feb 2022 - Jul 2022 (5 months)
Built front-end web interfaces through structured project work using common web technologies. Practiced problem-solving and logical thinking through implementation challenges.
Website Security Incident Response
Eagles Editing
Jan 2025 - Present (1 year 6 months)
Investigated a compromised WordPress website flagged by Google for malware and that remained unusable after failed in-house fixes. Removed a command-and-control backdoor and malicious artifacts, eradicated persistence mechanisms, restored site functionality, and cleared the Google malware flag.
Education
Degrees, certifications, and relevant coursework
AltSchool Africa
Diploma in Software Engineering, Software Engineering
Completed a Diploma in Software Engineering at AltSchool Africa in 2022.
Lagos State University
Bachelor of Science, Biochemistry
2015 - 2020
Grade: Second Class Honours
Earned a BSc in Biochemistry at Lagos State University (Second Class Honours). Completed the program between 2015 and 2020.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
Skills
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