Security Operations Engineer

La Fosse Associates; Greater London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A global financial services firm is looking for a Contract Security Operations Engineer to enhance its SIEM capabilities and ensure proper onboarding of log sources. Candidates must have strong hands-on AWS skills and experience in tuning SIEM platforms. The role is primarily onsite in Central London for 3 days a week, with a day rate of £400-£425. Proactive incident response support and a solid understanding of CrowdStrike are strongly preferred.

Qualifications

• Proven experience in tuning SIEM platforms and onboarding log sources.
• Ability to work autonomously and identify security issues proactively.
• Experience with modern DevOps/CI/CD practices is a plus.

Responsibilities

• Tune SIEM detections and define logging requirements.
• Onboard critical log sources across cloud environments.
• Support incident response activities.

Skills

Leading SIEM engineering activity

Strong hands-on experience in AWS

CrowdStrike optimization

Incident response support

Cloud-native architecture

Tools

SIEM platforms

Datadog SIEM

Job description

Security Operations Engineer (Contract)

A Global Financial Services Firm is seeking a Contract Security Operations Engineer with strong AWS experience, focused on tuning SIEM platforms and ensuring log sources are properly onboarded and optimised.

• Day Rate: £400–£425 per day
• IR35: Outside
• Duration: 3 months
• Location: Central London (3 days onsite, 2 days WFH)

Key Experience Required:

• Leading SIEM engineering activity, including tuning detections, onboarding critical log sources, and defining effective logging requirements across cloud environments.
• Supporting incident response efforts while working autonomously and proactively identifying areas that require security attention.
• Strong, hands‑on experience in AWS (essential), along with exposure to cloud‑native architectures and modern DevOps/CI/CD practices.
• Skilled in using and optimising CrowdStrike, with broad SIEM expertise; Datadog SIEM experience is highly advantageous.