Arnold N.

About Arnold N.

I’m an Information Security Analyst with strong experience in enterprise and cloud security, incident response, threat hunting, and insider threat detection. I’ve worked in fast-paced and highly sensitive environments, supporting investigations, reducing false positives, and enhancing detection logic across various platforms.My background includes managing complex incidents—from malware and credential theft to insider threats—while performing daily threat intelligence analysis, vulnerability validation, and response automation. I’ve worked with a wide range of SIEM, EDR, DLP, UBA, and threat intelligence platforms, while also contributing to alert tuning, procedure refinement, and internal documentation.I’m comfortable operating in cloud-native environments, applying frameworks such as NIST and Zero Trust to enhance posture and ensure compliance. I regularly collaborate with engineering, networking, and legal teams to manage escalations, refine detection workflows, and align security operations with organizational goals.Beyond technical work, I’ve taken on mentorship roles—training new analysts, assisting with onboarding, and helping team members better understand complex environments. I’m known for being dependable, detail-oriented, and proactive, with a strong commitment to protecting data confidentiality, integrity, and availability.Always learning. Always improving. Always ready to tackle the next challenge in cybersecurity.

Experience

1. Security Analyst

   Meta

   Aug 2023 — Present

   Supported security operations by monitoring internal platforms for threats, conducting investigations, and responding to incidents impacting core business environments.• Detected and triaged insider threat activity using internal detection systems and behavioral analysis techniques, contributing to the protection of sensitive user and company data.• Conducted daily threat intelligence analysis to identify and assess new and emerging threats, providing early warning signals and enhancing situational awareness.• Led threat hunting investigations to validate suspicious behaviors, uncover stealthy attacker activity, and reduce dwell time across internal infrastructure.• Escalated validated threats to appropriate teams, ensuring full remediation and alignment with internal policies and response standards.• Proposed and implemented alert tuning and allowlisting strategies, resulting in a 1% reduction in false positives and increased SOC analyst efficiency.• Utilized internal automation and orchestration platforms to accelerate investigation and response workflows, contributing to a 5% improvement in mean time to resolution (MTTR).• Collaborated regularly with Legal, Privacy, and Engineering teams during sensitive investigations, ensuring compliance and accurate evidence handling.• Applied frameworks such as MITRE ATT & CK and Zero Trust principles to improve detection coverage and refine security operations.• Actively contributed to the development and improvement of internal playbooks, response procedures, and onboarding documentation.• Mentored and trained over 5 new analysts, accelerating their learning curve and ensuring consistent understanding of internal tools and workflows.• Led the rollout of a new detection ruleset for insider threat signals, improving coverage and reducing missed detections in high-risk workflows.

Education

• Western Governors University

  Bachelor of Science - BS, Cybersecurity and Information Assurance