Senior Operational Security Engineer Consultant

Keystone Solutions; Brussel Hoofdstad; Sur place; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Consultancy on client sites

Varied client projects

Professional development

Career growth

Values-driven culture

Résumé du poste

Keystone Solutions seeks a Senior Operational Security Engineer to join the Key, Certificate, and Key Management squad for our Production Security BE tribe. You will secure electronic transactions, manage cryptographic keys and secrets, and oversee HSM operations across cloud-hosted and on-prem environments.

You will collaborate with stakeholders to translate security requirements into practical solutions, influence cryptographic choices, and drive incident resolution with a focus on high

Qualifications

• Minimum 5 years of relevant experience in IT security.
• Deep IT security expertise required for crypto and key management.
• Mastery of HSMs, PKI, and cryptographic standards (NIST).
• Experience with high-availability infrastructure and Vault architectures.
• Proficient with scripting and common admin tools (Python, Bash, Office).

Responsabilités

• Manage lifecycle of cryptographic keys, certificates, and application secrets (rotation, revocation, access control).
• Monitor and maintain HSM infrastructures for high availability and compliance.
• Troubleshoot security gaps in authentication, encryption, or secret storage.
• Advise on cryptographic standards and best practices as Crypto Design Authority.
• Lead or contribute to projects like HSM Lifecycle Management, Key Ceremonies, and Crypto Agility.

Connaissances

HSMs

PKI

HashiCorp Vault

Cryptography standards (NIST)

Scripting (Python, Bash)

Security architectures

Office tools

Formation

Bachelor's degree in IT Security

Outils

Adyton

nCipher

Rally

Portunus

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 your framework.
• Values: As a K-Stone, you bring our core values to every engagement.