Cyber Security Architect - Network Defense & SIEM

Eviden, part of the Atos Group, with an annual revenue of circa € 5 billion is a global leader in data-driven, trusted and sustainable digital transformation. As a next generation digital business with worldwide leading positions in digital, cloud, data, advanced computing and security, it brings deep expertise for all industries in more than 47 countries. By uniting unique high-end technologies across the full digital continuum with 47,000 world-class talents, Eviden expands the possibilities of data and technology, now and for generations to come.

Cyber Security Architect – Network Defense & SIEM

 We are seeking a seasoned Cyber Security Architect to lead the design and deployment of advanced cyber defense mechanisms across high-security infrastructures. The candidate will define architecture integrating SIEM, endpoint security, boundary protection, PKI, and network detection & response systems, ensuring full-spectrum protection in line with NATO and industry security frameworks.

This role requires hands-on experience with Splunk, Palo Alto + Panorama, Trellix EPP/EDR, NIDS/NIPS, PKI, and vulnerability assessment platforms.

Key Responsibilities:

• Architect and maintain a Security Information and Event Management (SIEM) solution using Splunk, covering real-time alerting, correlation, and threat hunting.
• Lead the deployment of centralized log aggregation for diverse system telemetry.
• Design and enforce network segmentation and boundary protection using Palo Alto NGFW and Panorama for policy management.
• Integrate and fine-tune Network Intrusion Detection and Prevention Systems (NIDS/NIPS) to monitor and block advanced threats.
• Implement Trellix Endpoint Protection Platform (EPP/EDR) across enterprise endpoints to detect and respond to malware, fileless attacks, and APTs.
• Lead Online Vulnerability Assessment (OVA) planning and execution cycles.
• Design and manage an enterprise-grade PKI (Certificate Authority, CRLs, OCSP, key lifecycle).
• Collaborate across infrastructure, networking, and application teams to ensure secure-by-design architecture.
• Provide full lifecycle documentation: HLD, LLD, SDS, compliance matrices, and threat models.

Technical Environment & Tools:

• SIEM: Splunk Enterprise Security
• Log Aggregation: Fluentd, Syslog, Kafka
• Firewall & BPS: Palo Alto NGFW + Panorama
• EPP/EDR: Trellix,
• NIDS/NIPS
• OVA: Tenable Nessus,
• PKI: Microsoft AD CS, OpenSSL, smart cards, OCSP/CRL
• Protocols & Security Standards: TLS, IPSec, NetFlow, STIGs, ISO 27001, NIST 800-53

Required Experience:

• 7+ years in cybersecurity engineering and architecture roles.
• Hands-on experience with Trellix EPP/EDR solutions in enterprise environments.
• Deep expertise in SIEM (Splunk) and Palo Alto firewall orchestration (Panorama).
• Strong foundation in network architecture and detection systems (NIDS/NIPS).
• Proven knowledge of PKI, vulnerability scanning, and endpoint hardening techniques.
• Familiarity with NATO compliance models and secure documentation practices.

Certifications (Preferred):

• CISSP, PCNSE, Splunk Certified Architect, Trellix Certified ePO/EDR Admin
• GIAC (GDSA, GCIA), OSCP, CEH, CompTIA CASP+/CySA+

Soft Skills:

• Strategic thinking with a defensive mindset
• Excellent technical writing, diagramming, and stakeholder communication
• Fluent in English
• Strong leadership and team collaboration abilities across security domains
• Clearance: Candidates must be able to obtain NATO SECRET clearance or equivalent.
• Travel: Occasional travel may be required for on-premises implementation, testing, and assessments.

Why Join Us?

• Training and Certifications: Access to continuous learning and career development opportunities.
•  Flexible working environment
• Competitive salary and benefits package.
• Reimbursement: Get a yearly fixed amount for reimbursement.
•  Performance Bonus: Earn an annual performance bonus based on your achievements.
•  Career Advancement: Explore numerous opportunities for professional growth and career advancement.
• Extra Vacation Days: Take advantage of additional vacation days to relax and recharge.

Let’s grow together.