Senior Security Engineer – M365 E5 Security, Compliance & Data Protection

Job Description & Summary

We’re a team that transforms vision into tech-enabled reality. We look for those who see technology not just as tools or platforms, but as the invisible infrastructure behind strategy, performance, and growth. We turn bold ideas into scalable, secure, and human-centered solutions.

Shaping tomorrow

Make a real impact, today, and tomorrow, through work that matters. Here, you will tackle today’s toughest challenges with a future-focused mindset; so our clients turn to us first when it matters most.

Make a real impact

In this dynamic environment, we are looking for ambitious and self-driven Senior Security Engineer – M365 E5 Security, Compliance & Data Protection to join our Cyber Security Tech team.

Implement and optimize Microsoft 365 E5 security and compliance solution, including Microsoft Defender XDR (Defender for Endpoint, Identity, Office 365, Cloud Apps), Microsoft Purview (DLP, Insider Risk, Information Protection), and Entra ID security features

Develop and maintain security policies and controls across the M365 ecosystem to protect user identities, sensitive data, email communications, and collaboration environments (Exchange Online, SharePoint Online, Teams)

Configure and manage Data Loss Prevention (DLP), Information Protection (MIP), sensitivity labels, retention labels, and eDiscovery policies to ensure regulatory compliance and protection of business-critical information

Implement Microsoft Defender for Cloud Apps (MCAS) or similar CASB to monitor user activities, detect anomalies, and enforce real-time session controls for sanctioned and unsanctioned SaaS applications

Collaborate with compliance, legal, and data governance teams to define classification taxonomies and map them to security controls within Microsoft Purview and related E5 capabilities

Perform technical implementation of security features such as multifactor authentication (MFA), Conditional Access, Identity Protection, Privileged Identity Management (PIM), and Just-in-Time (JIT) access

What you bring matters

Bachelor's degree in computer science, Cybersecurity, Information Technology, or a related field

Minimum 3 years of experience in security engineering, with hands-on involvement in the deployment and management of Microsoft 365 E5 Security & Compliance features

Knowledge of Microsoft 365 security technologies, including:

Microsoft Defender XDR suite

Microsoft Purview (DLP, Information Protection, Insider Risk, Compliance Manager)

Entra ID (formerly Azure AD) and Conditional Access

Microsoft Defender for Cloud Apps (MCAS)

Experience in data classification, data loss prevention, insider risk management, and regulatory compliance controls using M365

Understanding of identity and access management, Zero Trust principles, and role-based access control (RBAC)

Familiarity with cloud-native security operations, Microsoft Secure Score, and M365 service health/performance monitoring

Certifications are a plus:

Microsoft Certified: Security Operations Analyst Associate

Microsoft Certified: Information Protection and Compliance Administrator Associate

Microsoft Certified: Cybersecurity Architect Expert

Microsoft Certified: Identity and Access Administrator Associate

Excellent communication and documentation skills, capable of interacting with both technical and business stakeholders

Strong analytical thinking and problem-solving skills with a proactive and collaborative mindset

Strong verbal and writing skills in English and Greek

Bring your best, everyday

Your skills, integrity, and curiosity make the difference. At PwC Greece, we match that with an environment that brings out your best every day – supported by people who inspire, challenge, and grow with you.

What we offer goes beyond a competitive package. It’s about creating the conditions for you to learn, belong, and deliver impact. That means:

Your work life-balance supported by a hybrid working model

Your creativity sparked in collaborative office spaces

Your career growing through local and global opportunities

Your development advanced with continuous learning and professional certifications

Your well-being cared for with extra leave days and wellness initiatives

Your perspective valued in an inclusive team where your impact matters

Want to unlock new value by applying your unique perspective and talents? At PwC Greece, you lead by example. Our standards for quality and care are high – and together we surpass them. We redefine possibilities for our clients and communities.

Challenge accepted?

Our circle of connection matters - it’s at the heart of what we do. Click here (PwC life)

All applicants will be acknowledged and treated in the strictest confidence.