Security Engineer-UK

Certinia; United Kingdom; Remote; GBP 50,000 - 75,000; Full time

Job summary

Certinia, a leading Sys of Action for services businesses, is hiring a hands-on Security Engineer in the UK. You will bridge initial triage with security architecture, moving from monitoring to active investigation and containment.

You will maintain SOC capabilities, perform phishing simulations, run threat hunts, and write automation scripts (Python/Bash) to accelerate incident response across AWS, Azure and GCP.

Qualifications

• 1–3 years of hands-on experience in Information Security, SOC, or a related technical field.
• Deep understanding of networking (TCP/IP), operating systems (Linux/Windows/macOS), and web application security (OWASP Top 10).
• Practical experience securing resources in at least one major cloud provider (AWS, Azure, or GCP).
• Proficiency in Python, Bash, or similar languages for automation and parsing logs.
• Demonstrated ability to investigate security events, analyze logs, and understand the lifecycle of a cyber attack (MITRE ATT&CK framework).
• Ability to solve technical problems with minimal guidance and manage your own queue of tasks.
• Ability to explain security risks to non-security colleagues (e.g., developers or IT staff).
• Familiarity with Docker and Kubernetes security concepts (bonus).

Responsibilities

• Perform deep-dive investigations and root cause analysis of alerts.
• Execute phases of Incident Response (IR) including containment, eradication, and post-incident review.
• Assist with phishing triage and analyzing reported emails.
• Monitor the SIEM platform and triage incoming events.
• Conduct proactive threat hunting using intelligence feeds for IoCs in networks and cloud.
• Triage incoming reports to Bug Bounty Program.
• Run internal penetration tests on applications and cloud infrastructure.
• Support red team exercises by executing attack vectors and simulating adversary behaviors.
• Design and launch phishing simulations to improve training and awareness.
• Implement and maintain security controls in cloud environments (AWS/Azure/GCP).
• Analyze CNAPP dashboards, validate alerts, and detect threats.
• Write scripts to automate IR/DR steps and create custom detections.
• Review internal tools and new features for security improvements.

Skills

Networking

Operating Systems

Web App Security

Cloud Security

Incident Response

Threat Hunting

Communication

Tools

Python

Bash

Docker

Kubernetes

SIEM

Job description

Job Details

Posting Details

• Posted on October 22, 2026
• Remote
• Info.Sec
• Full-Time
• Requisition #: SECUR001556

Locations

Showing 1 location

UK Remote
United Kingdom

UK Remote
United Kingdom

+0 more locations less locations

Description

Security Engineer

(UK)

WHO WE ARE

Certinia is the leading System of Action for services businesses, powering organizations with the unified source of truth, services expertise and reasoning, and agentic action to bring the right knowledge and judgment to every decision across the entire services lifecycle. Purpose-built for professional services, customer success, and financial management, the world’s leading services organizations rely on Certinia to maximize margins, deliver faster time-to-outcome, and grow customer value with certainty. Certinia is backed by Haveli Investments, TA Associates, General Atlantic, and Salesforce Ventures. For more information, visit www.certinia.com.

THE ROLE

The Security Engineer will be a hands-on technical contributor, acting as a bridge between initial triage and high-level security architecture. You will move beyond simple monitoring to active investigation, incident handling, and the implementation of security controls. This role requires the ability to work independently on routine security operations while collaborating with senior engineers on complex threat scenarios and cloud architecture. You will be responsible for maintaining SOC capabilities, executing offensive security tasks, and assisting with automation efforts. This role reports to the Head of Information Security.

WHAT YOU WILL DO IN THIS ROLE

• Security Operations & Threat Management Support:
  • Perform deep-dive investigations and root cause analysis of alerts.
  • Execute specific phases of Incident Response (IR) procedures independently, including containment, eradication, and post-incident review.
  • Execute the Phishing Triage process, analyzing reported emails, and validating threats.
  • Assist with the day-to-day monitoring of the SIEM (Security Information and Event Management) platform, including triage of incoming events.
  • Perform proactive threat hunting using intelligence feeds to search for indicators of compromise (IoCs) within the network and cloud environments.
  • Perform initial triage of incoming reports to our public Bug Bounty Program.
• Offensive security:
  • Execute internal penetration tests on applications and cloud infrastructure with limited supervision, following established methodologies.
  • Support red team exercises by executing specific attack vectors and helping to simulate adversary behaviors.
  • Design and launch phishing simulations, analyzing the results to identify training gaps and improve human awareness.
• Security Engineering & Cloud Focus:
  • Implement and maintain specific security controls within cloud environments (AWS, Azure, GCP), such as IAM policies, security groups, and storage encryption configurations.
  • Assist in analyzing CNAPP dashboards to validate incoming alerts and detect legitimate threats.
  • Write scripts (e.g., Python, Bash) to automate IR/DR steps, accelerate log analysis, or create custom detections or analyzers.
  • Perform security reviews of internal tools and new features, providing actionable feedback to development teams.

WHAT YOU NEED TO BE SUCCESSFUL IN THIS ROLE

• 1–3 years of hands-on experience in Information Security, SOC, or a related technical field.
• Deep understanding of networking (TCP/IP), operating systems (Linux/Windows/macOS), and web application security (OWASP Top 10).
• Practical experience securing resources in at least one major cloud provider (AWS, Azure, or GCP).
• Proficiency in Python, Bash, or similar languages for automation and parsing logs.
• Demonstrated ability to investigate security events, analyze logs, and understand the lifecycle of a cyber attack (MITRE ATT&CK framework).
• Ability to solve technical problems with minimal guidance and manage your own queue of tasks.
• Ability to explain security risks to non-security colleagues (e.g., developers or IT staff).

WHAT ELSE WOULD BE GREAT

• eJPT, GSEC, CySA+, SSCP, or Associate-level Cloud Security certifications (e.g., AWS Certified Security – Specialty).
• Familiarity with Docker and Kubernetes security concepts.
• Experience with SAST/DAST tools or code review.
• A history of participation in CTFs, Hack The Box, or contributions to the security community.