Security Engineer - Enterprise Markets

Manchester, Glasgow, London or Newbury/Hybrid

At Gamma, we’re a dynamic, forward-thinking team revolutionizing the way businesses connect and communicate. We provide voice, data, and mobile solutions to businesses across the UK, Germany, Spain, and the Benelux region. We’re expanding rapidly to bring digital automation and Gamma-powered services to Enterprise, Public Sector and Small to medium businesses, both directly and through a growing network of channel partners.

We move fast with a start‑up mindset, but we have the stability of a leading European business. Our team thrives on collaboration, innovation, and the belief that diverse perspectives make us stronger. Join us, and you’ll have the opportunity to make an impact, grow your career, and be part of a company that celebrates inclusivity and fresh ideas.

We are seeking a skilled and client-focused Security Engineer with strong expertise in Vulnerability Management and Network Security engineering. This role operates within a managed service provider environment, delivering security services to enterprise clients, with a primary focus on risk‑based vulnerability management alongside network security, firewall optimisation, and access control. The successful candidate will be responsible for identifying, assessing, prioritising, and driving remediation of vulnerabilities across complex enterprise environments.

They will also contribute to strengthening overall cyber resilience by aligning vulnerability management with Managed Detection and Response (MDR) operations, supporting Secure Access Service Edge (SASE) frameworks, and advancing Zero Trust security models across network, identity, and access control layers. This is a hands‑on engineering role requiring deep technical expertise across vulnerability management and network security, combined with strong stakeholder engagement.

The role ensures security risks are proactively reduced, controls are optimised, and remediation is delivered in line with contractual SLAs and cyber security best practices.

• Deliver end-to-end vulnerability management services to clients, including discovery, assessment, prioritisation, reporting, and remediation tracking
• Operate and maintain vulnerability scanning tools (e.g., Qualys, Nessus, Rapid7) across multiple client environments
• Perform regular vulnerability scans, validation, and re‑testing to ensure remediation effectiveness
• Analyse vulnerability data, eliminate false positives, and provide actionable remediation guidance tailored to client environments
• Prioritise vulnerabilities using risk‑based methodologies (CVSS, exploitability, business impact, threat intelligence)
• Track remediation activities and ensure closure within agreed SLAs and service metrics
• Produce client‑facing reports, dashboards, and service reviews, highlighting risk posture, trends, and key improvement areas
• Act as a trusted advisor to clients, providing best practice recommendations on vulnerability and risk reduction strategies

• Support deployment and optimisation of Microsoft Sentinel and SIEM/XDR platforms
• Contribute to detection engineering (use case development, rule tuning, alert optimisation)
• Onboard and integrate telemetry across network, endpoint, cloud, and identity sources
• Support threat detection across SIEM, NDR, and identity platforms
• Collaborate with SOC teams to improve detection coverage and reduce false positives
• Align vulnerability insights with MDR workflows and threat detection use cases

• Identify, analyse, and manage network and system vulnerabilities across enterprise environments
• Collaborate with infrastructure, cloud, and application teams to drive remediation activities to completion
• Troubleshoot and resolve network/security issues linked to vulnerabilities and access controls
• Support secure network architecture and ensure adherence to security and compliance standards
• Support SASE architectures (e.g. Prisma, Cisco Secure) and secure connectivity models
• Contribute to Zero Trust…