IT Security & Firewalls Network Infrastructure Engineer

Introduction Our client has a large global infrastructure and is looking for an experienced Infrastructure Engineer who has excellent experience within security & firewall protection The role calls for someone with strong technical expertise and an analytical approach to problem-solving, and have the ability to work both alone and within a team environment. Working Patterns: This role is based on site 2-3 days per week, remote working the rest of the time. Role overview Our client is looking for someone with 3-5 years' experience of working on on-premises and O365 environments to support the company's internal business environment. The right candidate will have experience in things such as: SIEM, Defender, SOAR or similar Vulnerability management SOC (Security Operations Centre) work Security Investigations Maintenance of firewalls Have worked in a Security and Networks team previously - managing, maintaining and investigating security issues No accreditations required You will be working with 5 other people in the team. Key responsibilities Manage and maintain on-premises infrastructure, including firewalls, SIEM/SOAR platforms, network troubleshooting, and vulnerability management. Strengthen and oversee security across the Microsoft 365 environment. Monitor, detect, and respond to security incidents, ensuring timely remediation and continuous improvement. Implement and maintain security policies, controls, and best practices to protect systems and data. Work collaboratively on complex projects while taking ownership of specific technical areas. Operate effectively under pressure in a fast-paced environment, managing priorities and responding to critical issues. Respond effectively to incidents and challenges in a fast-paced, high-pressure environment. Skills & experience Hands-on firewall management experience, ideally with Check Point or Palo Alto. Experience working with SIEM and SOAR platforms such as Splunk SOAR or LogRhythm. Strong background in vulnerability management, preferably using Tenable. Solid network troubleshooting skills, with Cisco experience desirable. In-depth knowledge of the Microsoft 365 security stack. Strong problem-solving skills with the ability to work independently. Excellent communication skills and a collaborative approach to teamwork. The client would also like to see some of the below, but this is not essential: PowerShell scripting experience. Familiarity with equivalent technologies where direct experience with specific tools is not available. Exposure to automation initiatives and continuous process improvement. Additional benefits Pension up to 10% client contribution. Life assurance, income protection insurance and critical illness cover. Option to buy & sell holiday. Dental, health, medical, travel and gadget insurance. 24/7 Digital GP. Our client is committed to providing a diverse and inclusive workplace and welcomes applications from all backgrounds. RECOMMEND A FRIEND: If you have professional friends/colleagues who would be interested in one of our roles and our excellent levels of service too, we'd like to recognise your recommendations with a 'thank you' of our own. For every friend you refer who then starts a role through Datasource either Contract or Permanent, we will send you £200 of Love to Shop Gift Vouchers & gift your friend £100 in Love to Shop Gift Vouchers as well! You will be required to hold a minimum of SC Clearance. If you do not hold an active SC clearance, please familiarise yourself with the vetting process before applying. (c) Copyright Datasource Computer Employment Limited 2026.