Job Description
Overview Base pay range. A great opportunity for a Security Engineer to join a growing Financial Services Firm in London in a Hybrid working role. We are a Commodities focused Financial Services Firm based in London with offices in the US and Asia. We are seeking a Senior Security Engineer to join our London team.
Reporting to the IT Security Officer, you will work alongside the IT Security Engineer as part of a small IT Security team. As the Senior Security Engineer, you will implement and maintain robust security systems and protocols across the IT infrastructure. You will conduct risk assessments and vulnerability scans, mitigate vulnerabilities identified in penetration testing, and implement preventative measures to protect against cyber threats. You will monitor the security infrastructure and detect and respond to potential threats. You will help mentor and develop the IT security engineer and collaborate with the IT team to ensure compliance with security standards and best practices; you will essentially be a key technical leader in safeguarding sensitive data and systems.
Key responsibilities Manage WAF and DDoS systems
Manage the Web Security Gateway
Manage the Email Security Gateway
Manage the SIEM, SOAR, Identity Protection and EDR, and respond to alerts and threats
Carry out vulnerability scans, identify risks, and remediation
Manage the perimeter and VPN firewalls
Manage MFA and SSO
Manage MDM/MAM and Conditional Access
Manage security certificates and keys
Manage IDS and IPS
Manage PAM systems
Deliver Cyber Security Awareness Training
Remediate vulnerabilities and weaknesses identified during penetration testing
Ad-hoc IT security projects
The successful candidate will have working knowledge and experience in managing the following technology stack:
CrowdStrike EDR
Mimecast Mail Security Gateway
Duo
Okta
Rapid7 IVM, Tenable IO or Nessus
Rapid7 IDR or CrowdStrike Next Gen SIEM
Palo Alto Firewalls and Panorama
InTune and Conditional Access
Experience using the following technology stack would be advantageous; understanding the principles is required.
Imperva WAF and DDoS
Menlo Web Security Gateway
KnowBe4
Digicert Certificates and Microsoft Certificate Services
Ivanti or Automox patching
AppCheck or Tenable WAS
Desired Education: CISM, MS SC100, 200 and 900, OSCP or other penetration testing qualifications
Industry: Financial services, SOC, Pentesting is desirable
Personal Skills: Excellent inter-personal, written and verbal communication skills
The ability to handle multiple priorities, tasks and projects simultaneously
Clear and precise verbal and written communication
Ability to deliver presentations to staff
Cross functional influence, engagement and collaboration skills
Location and hours The position is usually based in our London Head Office
Hours: 0730 – 1730 shift pattern with occasional home/office rotation (0730-1630 two days from home, 0830-1730 three days in the office)
There will be periods of weekend and out-of-hours work
Job details Seniority level: Mid-Senior level
Employment type: Full-time
Job function: Information Technology
Industries: Financial Services and Technology, Information and Media
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Job Details
Posted Date:
December 22, 2025
Job Type:
Construction
Location:
London, United Kingdom
Company:
Marlin Selection Recruitment
Ready to Apply?
Don't miss this opportunity! Apply now and join our team.