Cloud / M365 Security Engineer

About Spektrum

Spektrum supports apex purchasers (NATO, UN, EU, and National Government and Defence) and their Tier 1 supplier ecosystem with a wide range of specialist services. We provide our clients with professional services, specialised aerospace and defence sales, delivery, and operational subject matter expertise. We are looking for personnel to join our team and support key client projects.

At Spektrum, we support a wide range of NATO organizations and programmes by providing highly skilled professionals across defence, security, digital transformation, engineering, and information technology. Our teams contribute to projects that strengthen the Alliance's operational readiness, enhance interoperability between member nations, and enable the delivery of critical capabilities across land, air, maritime, cyber, and space domains.

For this opportunity, our client is a private technology company that delivers advanced IT and engineering services in support of NATO programmes. Working alongside NATO stakeholders, the company provides technical expertise, software development, systems integration, and digital solutions that help modernize and sustain mission-critical capabilities. As part of this project, consultants will contribute to the development and support of technologies that underpin NATO's operational effectiveness and long-term digital transformation.

Responsibilities

• Cloud / M365 Security Engineer

TG-001-3

• The Cloud Computing Support – Expert Support (ICT Security Officer) will provide highly specialized ICT security services in support of the client, covering the ICT environment and systems defined in the overarching Service Level Agreement (SLA) between client and the Office, including the management of a dedicated Microsoft 365 tenant.
• Services shall be provided in accordance with applicable ICT governance, standards, and security policies, commensurate with the available capacity to ensure reasonable service coverage (5x8 during defined working hours), complemented by a duty officer modality outside working hours under specifically defined conditions to support and respond to urgent security-specific needs, including incident response.
• Expert Support level: the incumbent shall possess extensive relevant professional experience requiring specialized technical knowledge and skills. He/She will be expected to develop new approaches, techniques, or policies and/or design guidelines and standards of considerable depth that have an impact on the overall execution of programmes or services of a function or various interrelated areas. Expected outputs at this level include, inter alia, highly specialized technical security support and project-wide proposals.

Service Scope

• Microsoft 365 tenant: Exchange Online, SharePoint Online, OneDrive, Teams, and associated collaboration workloads.
• Microsoft Entra ID (Azure AD): identities, authentication, conditional access, and privileged accounts within the covered tenant.
• Microsoft Defender XDR suite: Defender for Office 365, Defender for Endpoint, Defender for Cloud Apps, and Defender for Identity, as deployed.
• Microsoft Purview and related compliance, audit, and data-protection capabilities, as applicable.

Security Monitoring & Response Systems

• Designated ICT security systems and services generating security reports and alerts for the covered environment.
• Threat intelligence sources and platforms relevant to the covered environment.
• Vulnerability identification and assessment capabilities applicable to the covered ICT environment and systems.

Resilience & Recovery

• Operational Resilience (OR) controls implemented and maintained by relevant operations teams across the covered ICT environment and systems.
• Disaster recovery plans and Disaster Recovery Exercises (DRX) performed by the respective operations teams.
• Advanced hunting using Kusto Query Language (KQL) and other environment-specific threat-hunting capabilities.
• Design, documentation, and continuous improvement of detection and response methods, procedures, runbooks, and tooling.
• Threat intelligence handling: collection, analysis, sharing, and coordination of recommended mitigation measures (e.g., MITRE ATT&CK mapping, IOC management).
• Security architecture and configuration-ba

Requirements

Microsoft 365 & Cloud Security

• In-depth expertise in Microsoft 365 security administration: Microsoft Defender XDR, Defender for Office 365 (anti-phishing, safe links/attachments, mail-flow protection), and Defender for Endpoint.
• Microsoft Entra ID security: identity protection, risky sign-in/user investigation, conditional access design, MFA enforcement, and privileged identity management.
• Investigation and remediation of compromised accounts, suspicious e-mails, business e-mail compromise (BEC), and other cloud-borne threats.
• Microsoft Sentinel or equivalent cloud SIEM/SOAR platforms: analytics rules, incident triage, automation/playbooks, and watchlists.

Security Operations & Incident Response

• Security incident response methodologies aligned with recognized frameworks (e.g., NIST SP 800-61), including containment, eradication, and recovery.
• Digital forensics analysis: evidence collection and preservation, log and artifact analysis, and root-cause determination for cloud and hybrid environments.

Vulnerability & Risk Management

• Security assessment of ICT environments and systems throughout their life cycle, including configuration reviews against security baselines and benchmarks (e.g., CIS, Microsoft Secure Score).
• Vulnerability verification, prioritization (e.g., CVSS-based), remediation guidance, and validation of corrective measures.
• Preparation of security advisories, notifications, and remediation recommendations referencing relevant security updates.