Security Engineer – C4 Level

Location: Flexible / Hybrid

Team: Information Security

Brand: Sainsbury’s

Are you a network-savvy security engineer ready to shape the future of retail security?

At Sainsbury’s, we’re not just a 150-year-old retail chain—we’re a tech-forward organisation on a transformative journey. Security is at the heart of our innovation, enabling teams to build boldly while protecting what matters most. We’re looking for a Security Engineer with a strong foundation in network security, cloud technologies, and PKI infrastructure to join our vibrant team.

What You’ll Do Network & Cloud Security Engineering

• Design and implement secure network architectures across hybrid environments.

• Engineer VPN solutions and secure remote access technologies.

• Deploy and manage cloud-native security controls (Azure, AWS, GCP).

• Integrate cloud security posture management (CSPM) and workload protection platforms.

PKI & Certificate Management

• Manage internal PKI infrastructure and certificate lifecycle.

• Implement certificate-based authentication for secure access.

• Collaborate on identity and access management (IAM) strategies.

Email & Web Security

• Configure and maintain email security gateways (Proofpoint, Mimecast).

• Engineer web proxy and CASB solutions (e.g., Netskope) to enforce secure browsing policies.

Cross-Team Collaboration

• Partner with Security Operations Centre, Analysts, and Product Managers.

• Translate business needs into secure technical solutions.

• Validate security requirements across Agile delivery pipelines.

Documentation & Risk Management

• Document security processes and technical configurations.

• Identify and mitigate risks across network and cloud environments.

• Ensure compliance with architectural and design standards.

Essential Criteria:

• Strong hands-on experience with network security technologies: firewalls, IDS/IPS, VPNs, SD-WAN, and encryption.

• Deep understanding of cloud security principles and architectures.

• Proficiency in PKI, certificate management, and cryptographic protocols.

• Familiarity with email and web security tools like Proofpoint, Mimecast, and Netskope.

Additional criteria:

• Agile mindset with the ability to deliver in fast-paced environments.

• Passion for learning and staying ahead of emerging security trends.

What You’ll Get in Return

• Colleague discount across Sainsbury’s, Argos, and Habitat.

• Competitive holiday allowance and bonus scheme.

• Pension plan and exclusive retail offers.

• Flexible working options to support work-life balance.

Join Us

Be part of a team where your skills in network and cloud security will make a real impact. Help us build a secure future for millions of customers while growing your career in a dynamic, inclusive environment.