Senior Security & IT Infrastructure Consultant

What success looks like in this role:

We are looking for a motivated Senior Security & IT Infra Consultant with a strong focus on networking to join our growing security team. You will work on impactful security projects, including large-scale encryption networks, helping customers design, qualify, build and operate secure infrastructures.

You will be involved in the full lifecycle of our solutions — from design and proof-of-concepts through testing, deployment and handover to operations . You will also act as a trusted technical advisor to customers on networking and security topics.

This role requires on-site presence in our Diegem office and lab, where you will work hands-on with hardware, test environments and security platforms. We are looking for someone who enjoys working independently, taking ownership, and continuously developing their expertise in networking and cybersecurity.

If you enjoy solving complex technical challenges and want to grow in a small, agile and highly skilled team, this role is for you.

What You Will Do

You will play a key role in analyzing, building and testing secure network solutions. Your responsibilities will include:

Network & Security Analysis
 

• Reviewing customer network and security capabilities

• Assessing and analyzing security posture

• Mapping and analyzing data flows and processes
  
   

Lab & System Administration
 

• Building Proof-of-Concept (PoC) environments

• Set up, creatively adapt, upgrade and maintain the lab environment

Testing & Automation

• Testing and troubleshooting new systems and architectures

• Build and execute creative automation of the security infrastructure testing

•  Updating operational procedures and documentation

• Build and execute automating staging and pre-provisioning processes
  
   

Deployment & Migrations
 

• Supporting staging, pre-provisioning and rollout of solutions

• Assisting and guiding customers during migrations

• Providing higher-level support for delivered solutions
  
   

Documentation & Coordination
 

• Creating and maintaining operational procedures and manuals

• Writing activity and test reports

• Tracking issues and following up with vendors and partners

• Gathering and managing legal, business and technical requirements

You will be successful in this role if you have:

• Master’s degree in Engineering, Information Technology, Computer Science, or a related field, combined with relevant professional experience, or an equivalent combination of education and experience

• Agile, creative thinker with a sense for detail and quality

• Strong problem‑solving skills and eagerness to learn

• Fluency in English is required and proficiency in Dutch and/or French; both is considered an asset

• Must be prepared to work onsite at the office/lab in Diegem for the week

• Knowledge of computer networking and network security

• 10+ years of experience within the field

• Eligible for EU Secret Security Clearance

• Some experience with network infrastructure deployment and maintenance is a plus

• Experience with Linux (CLI and network configuration)

• Familiarity with automation tools (such as Ansible) and scripting languages (like Bash or Python) is an advantage
  
   

• What We Offer

• Hospitalization Insurance and various other insurances 

• Lunch vouchers

• Eco-vouchers

• Referral Program

• Learning and training support

• Last but not least, a great team

If you're passionate about solving complex challenges and eager to grow within a small, agile team, we’d love to hear from you.

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Unisys is proud to be an equal opportunity employer that considers all qualified applicants without regard to age, caste, citizenship, color, disability, family medical history, family status, ethnicity, gender, gender expression, gender identity, genetic information, marital status, national origin, parental status, pregnancy, race, religion, sex, sexual orientation, transgender status, veteran status or any other category protected by law.

This commitment includes our efforts to provide for all those who seek to express interest in employment the opportunity to participate without barriers. If you are a US job seeker unable to review the job opportunities herein, or cannot otherwise complete your expression of interest, without additional assistance and would like to discuss a request for reasonable accommodation, please contact our Global Recruiting organization at [email protected] or alternatively Toll Free: 888-560-1782 (Prompt 4).  US job seekers can find more information about Unisys’  EEO commitment here.