cypherctrl

Whoami

I'm Cypher Ctrl, a Cloud Security Engineer and Application Security Lead at Oyster HR, with 7 years across security operations, AppSec, cloud and AI security. My background spans incident response and offensive security across banking, Big Four consulting and SaaS. I build security programmes that let a company grow without slowing down, and that hold up when an auditor, a regulator or a board asks the hard questions.

Security is chaotic by nature: endless alerts, findings and requests that all claim to be urgent. I'm good at making it calm. I work out what actually matters, fix it properly, reprioritise the rest, and keep leadership in the loop. Engineers get to build, leadership gets clear answers, and security quietly gets better every quarter.

That comes from working every side of a security incident. As a penetration tester I tested for the weaknesses that lead to them. At PwC I led incident response and digital forensics on incidents with over $7M in associated losses. At SBM Bank I ran security operations for a licensed bank across 1,500 endpoints. Today I'm Application Security Lead at Oyster HR, where I own the engineering security programme.

Work with me

Experience

Application Security Lead @ Oyster HR

Jan 2025 – present

Owning the engineering security function across application, cloud, CI/CD, incident response and AI security.

Lead Senior Cybersecurity Engineer @ SBM Bank

Nov 2022 – Jan 2025

Owned security operations, network and endpoint security, IAM and vendor security for a licensed bank: 1,500 endpoints, 500 staff, on-prem and cloud (Azure, GCP).

Senior Cyber Security Consultant @ PwC

Jul 2021 – Nov 2022

Penetration Tester & SOC Analyst @ Visibility Technology Services

Oct 2020 – Jun 2021

Domains & tooling

Publications, speaking & mentorship

Certifications

Views on this site are my own, not my employer's.