Security Consultant

Asenium Consulting; Brussel Hoofdstad; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

Asenium Consulting in Brussels invites a Senior Security Consultant to strengthen a security team in a financial services environment. You will oversee security in business projects, challenge controls, and coordinate NIST evidence and maturity reporting.

The role is hybrid in Brussels with 50% on-site and 50% homeworking, ASAP until 31 December 2026, requiring strong IT security expertise and ability to work across teams.

Qualifications

• At least 5 years of relevant experience in IT production or networks.
• Software development experience and understanding of SDLC.
• Knowledge of network security fundamentals.
• Familiar with NIST and ISO 27001 security frameworks.
• Foundational knowledge of IT risk assessment and management.
• ISO 27001 certification or equivalent.
• Master’s degree or bachelor’s degree with experience.
• Ability to work autonomously and collaborate across teams.
• Fluent French or Dutch and good English.

Responsibilities

• Oversee security in business projects and challenge implemented controls.
• Coordinate NIST evidence and maturity reporting.
• Ensure security requirements are integrated early into initiatives.
• Complete and review application security assessments with delivery teams.
• Assess change compliance and support release decisions.
• Coordinate with SMEs to collect evidence for NIST controls.
• Submit NIST control evidence to the central security team.
• Negotiate evidence acceptance criteria with the central team.
• Report progress on NIST controls and elevate IT management issues.

Skills

Fluent French

Fluent Dutch

Good command of English

Education

Master’s degree

Bachelor’s degree with experience

Job description

Asenium is looking for a Senior Security Consultant to strengthen a security team in a financial services environment. You will oversee security in business projects, challenge implemented controls, and coordinate NIST evidence and maturity reporting.

Assignment:

ASAP–31 December 2026.

Work setup:

Hybrid – Brussels, Belgium. 50% on-site / 50% homeworking.

Responsibilities:

• Ensure security requirements are integrated early into business initiatives and projects.
• Complete and review application security assessments with delivery teams.
• Assess change compliance and support the CISO’s GO/NO-GO release decisions.
• Coordinate with subject matter experts to collect evidence for NIST controls.
• Submit NIST control evidence to the central security team.
• Negotiate evidence acceptance criteria with the central team.
• Report progress on NIST controls and elevate issues to IT management.

Must-have requirements:

• At least 5 years of relevant experience, with knowledge of IT production or networks in technical and/or functional roles.
• Previous software development experience and a good understanding of SDLC activities.
• Knowledge of network security fundamentals.
• Good understanding of NIST and ISO 27001 security frameworks.
• Foundational knowledge of IT risk assessment and management.
• ISO 27001 certification or equivalent.
• Master’s degree, or bachelor’s degree with experience.
• Ability to work autonomously, collaborate across teams, and challenge security measures.
• Fluent French or Dutch, and a good command of English.