David Okonkwo
Cybersecurity Analyst
SOC operations · Incident response · Threat intelligence · Compliance
Lagos, Nigeria
+234 803 456 7890
d.okonkwo@securemail.com
linkedin.com/in/davidokonkwo
CONTACT
Phone
+234 803 456 7890
Email
d.okonkwo@securemail.com
LinkedIn
linkedin.com/in/davidokonkwo
Location
Lagos, Nigeria
CORE SKILLS
SIEM
— Splunk, IBM QRadar
EDR
— CrowdStrike, SentinelOne
Network Security
— Firewalls,
IDS/IPS, Wireshark
Threat Intel
— MITRE ATT&CK,
OSINT
Vulnerability Mgmt
— Nessus,
Qualys
Cloud Security
— AWS, Azure
Security Center
Scripting
— Python, Bash,
PowerShell
Compliance
— ISO 27001, NIST,
GDPR
CERTIFICATIONS
CISSP
— ISC² (2024)
CEH
— EC-Council (2022)
CompTIA Security+
(2021)
GIAC GCIH
(2023)
Azure Security Engineer
—
Microsoft (2023)
LANGUAGES
English (fluent)
Yoruba (native)
Hausa (conversational)
TOOLS & PLATFORMS
PROFESSIONAL SUMMARY
Results-driven Cybersecurity Analyst with 5+ years of experience
protecting enterprise networks, investigating incidents, and strengthening
security postures across fintech and telecommunications sectors. Proven
ability to reduce mean-time-to-detect (MTTD) by 40% through SIEM
optimisation and threat-hunting automation. Strong collaborator who
bridges technical security operations with business risk objectives. CISSP
and CEH certified.
EXPERIENCE
Senior Cybersecurity Analyst
Jun 2022 – present
Pivot Financial Services · Lagos
Cybersecurity Analyst
Mar 2020 – May 2022
Aftel Networks Ltd · Lagos
Lead 24/7 SOC monitoring for 6,000+ endpoints across 3 geographies,
triaging 150+ alerts daily and escalating critical incidents within 15 minutes.
•
Reduced mean-time-to-detect (MTTD) from 8 hours to 4.8 hours by tuning
Splunk correlation rules and deploying automated threat-hunting playbooks.
•
Designed and implemented an incident response framework aligned with
NIST 800-61, cutting average containment time by 35% in the first year.
•
Conducted quarterly vulnerability assessments using Qualys and Nessus,
prioritising remediation for 1,200+ findings across on-prem and AWS
environments.
•
Delivered security awareness training to 400+ employees, resulting in a 60%
reduction in phishing click-through rates over 12 months.
•
Collaborated with DevOps to embed security scanning (SAST/DAST) into
CI/CD pipelines, catching 45 critical flaws before production release.
•
Monitored and analysed security events from 3,500+ devices using IBM
QRadar, investigating potential intrusions, malware outbreaks, and policy
violations.
•
Responded to 200+ security incidents including ransomware, DDoS, and
insider threats, documenting root-cause analyses and recommending
preventive controls.
•
Performed digital forensics on compromised endpoints and servers,
recovering critical evidence that supported two successful legal actions.
•
Developed and maintained 35+ detection rules and use cases, improving alert
fidelity by 25% and reducing false positives by 30%.
•
Assisted in achieving ISO 27001 certification by drafting security policies,
conducting internal audits, and coordinating evidence collection.
•
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