Senior Operational Security Engineer Consultant

Keystone Solutions; Brussel; Hybride; EUR 90 000 - 120 000; Plein temps

Résumé du poste

Keystone Solutions is seeking a Senior Operational Security Engineer to join the Production Security BE tribe in Belgium. You will manage cryptographic keys, certificates, and application secrets, while operating and supporting HSM infrastructures to ensure high availability and regulatory compliance.

You will act as Crypto Design Authority and contribute to strategic projects, translating requirements into secure, scalable solutions for internal and external clients.

Qualifications

• Minimum 5 years of experience in IT security.
• Deep IT security expertise with hands-on HSM/PKI knowledge.
• Experience with HashiCorp Vault and high-availability systems.
• Strong communication and stakeholder management.

Responsabilités

• Manage the lifecycle of cryptographic keys, certificates, and application secrets.
• Monitor and maintain HSM infrastructures for high availability and compliance.
• Troubleshoot incidents and close security gaps in authentication and encryption.
• Act as Crypto Design Authority on cryptographic standards and best practices.
• Lead or contribute to strategic projects (PQCrypto, EKU readiness, key ceremonies).

Connaissances

Security architecture

Threat modeling

Collaboration

Problem solving

Outils

HashiCorp Vault

nCipher HSM

PKI

Portunus

Adyton

Rally

ServiceNow

Description du poste

Mission Overview:

This is a consultancy mission at a client site, representing Keystone Solutions. As a consultant, you will be hired by Keystone Solutions to work on client projects, bringing your expertise to dynamic environments and diverse challenges.

Role Description:

Our client is seeking a Senior Operational Security Engineer to join the Key, Certificate, and Key Management squad within the Production Security BE tribe. The team specializes in lifecycle management of cryptographic keys, certificates, and application secrets. The mission is to secure electronic transactions, authentications, and cloud-hosted applications while ensuring compliance with EU/Group regulations and industry standards. You will operate and support Hardware Security Modules (HSMs) and deliver reliable security solutions for internal and external customers.

Responsibilities:

• Manage the lifecycle of cryptographic keys, digital certificates, and application secrets (rotation, revocation, access control).
• Monitor and maintain HSM infrastructures to ensure high availability and compliance.
• Troubleshoot incidents and resolve security gaps in authentication, encryption, or secret storage.
• Act as a Crypto Design Authority, advising on cryptographic standards, algorithms, and best practices.
• Lead or contribute to strategic projects, including Post-Quantum Cryptography, EKU Readiness, HSM Lifecycle Management, Key Ceremonies, Crypto Agility, Platform Integration, and partnering with stakeholders to translate requirements into technical solutions.

Language Requirements:

• Dutch: A plus
• French: Fluent spoken
• English: Fluent spoken and written

Telework:

• Expectation: 50% on site & 50% homeworking

Required Experience / Knowledge:

• At least 5 years of relevant experience
• Deep IT security expertise
• Technical mastery of HSMs, PKI, Hashicorp Vault, cryptographic standards (NIST), and operational oversight of high-availability infrastructures
• Microsoft Office (Word, Excel, Powerpoint)
• Scripting (Python, Bash, etc.), ServiceNow, Rally, Portunus, Adyton, nCipher, HashiCorpVault (preferable)

Business Experience:

• Bridging tech and business: turning abstract security requirements into feasible IT solutions
• Agile in action: anticipating change, prioritizing flexibly, and contributing to iterative enhancements
• Agile Methodology Adoption (preferable)

Soft Skills:

• Collaboration and results driven
• Client-centric by design: translating complex cryptographic requirements into practical, user-friendly implementations
• Proactive and analytical: enhancing processes and improving key and certificate rotation protocols

Keystone Solutions Advantages:

• Consultancy Nature: You will work on-site as a Keystone Solutions consultant, bringing your expertise to client projects.
• Dynamic Projects: Experience a variety of challenges across different client environments.
• Turbo-Charged Learning: Benefit from professional development and broad learning experiences.
• Skyrocketing Ambition: Keystone Solutions is committed to your career growth within our framework.
• Values: As a K-Stone, you bring our core values to every engagement.