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Principal Security Architect

1 month ago

City Of London, United Kingdom Tesco Technology Full time

Principal Enterprise Security Architect


Job Description:


We are seeking a highly skilled and experienced Enterprise Security Architect, who will be responsible for ensuring that all enterprise-built platforms and solutions align with our existing security framework and industry standards. This role requires a deep understanding of security principles, technologies, and best practices to protect our information assets and ensure compliance with regulatory requirements. The focus will be on collaborating with key stakeholders across various domains to enable our technology colleagues to work efficiently and manage their environments effectively. You will perform comprehensive risk assessments, develop strategies to mitigate threats, and ensure alignment with organizational security principles and best practices.


Key Responsibilities:


  • Design and implement robust security architectures for enterprise-wide capabilities, which our technology teams rely on regularly to operate their services and perform their day-to-day tasks efficiently, addressing identified threats and vulnerabilities.
  • Conduct thorough risk assessments for new systems and existing environments, reviewing their designs and architectures to ensure they meet modern security requirements, identifying security risks, and recommending mitigation strategies.
  • Influence and guide other teams to implement security solutions by collaborating across functions to integrate security principles and ensure systems align with business needs.
  • Ensure all enterprise-built platforms align with our existing security framework and industry standards, while collaborating with other enabling and architecture teams to integrate security into all aspects of the organization's operations.
  • Evaluate and enhance security processes to improve their efficiency and comprehensiveness.
  • Continuously monitor and respond to emerging security trends and threats to workplace environments, virtualization technologies, and databases.
  • Develop and maintain security architecture documentation, including policies, diagrams, and procedural guides.
  • Act as an SME and advise on the security of the M365 platform, workplace solutions, and infrastructure control plane capabilities such as virtualization layers (VMWare).
  • Lead and participate in internal technology initiatives to implement secure enterprise systems, ensuring alignment with security frameworks and organizational goals to enhance security posture.


Key Requirements:


Soft Skills:

  • Proven leadership experience as a technical individual contributor in complex organizations.
  • Analytical mindset with a proactive approach to identifying and solving security challenges.
  • Strong communication and interpersonal skills to articulate complex security concepts to diverse audiences.
  • Ability to work collaboratively with cross-functional teams while managing multiple initiatives.
  • Demonstrated curiosity and flexibility in applying knowledge and advice.


Technical Skills:

  • Demonstrable experience and expertise in designing, implementing, and applying balanced controls from security frameworks such as NIST, CIS, ISO 27001, and MITRE.
  • Expertise in security controls and best practices for cloud-based workplace environments.
  • Proficiency in Microsoft 365 security, compliance capabilities, identity and access management, and threat protection, including Microsoft Defender, Microsoft Entra, and Microsoft Purview.
  • Expertise with virtualization platforms, ideally on VMware security solutions, including VMware NSX, VMware Carbon Black Cloud, and Horizon.
  • Familiarity with virtualization security best practices and endpoint security.
  • Proficiency in securing databases (e.g., SQL, NoSQL), with a focus on encryption, authentication, and monitoring solutions.
  • Proficiency in risk analysis, security controls management planning, and disaster recovery planning.
  • Experience with security technologies such as firewalls, intrusion detection/prevention systems, and encryption.


Qualifications & Experience:


  • Strong knowledge of security frameworks and standards (e.g., NIST, ISO 27001).
  • Bachelor's degree in Computer Science, Information Technology, or a related field.
  • Minimum of 10 years of experience in information security, with at least 5 years in a security architecture role.
  • Professional certifications such as SABSA, CISSP, CISM, or TOGAF are highly desirable.
  • Professional certifications in risk management such as CRISC are desirable.