---
title: 'Senior Cyber Security Engineer (Pen Tester) at Spektrum'
canonical: 'https://feeny.ai/job/senior-cyber-security-engineer-pen-tester-spektrum-capellen-cdthcwz047jn'
type: 'job'
last_seen: '2026-09-10'
---

# Senior Cyber Security Engineer (Pen Tester) at Spektrum

- **Company:** Spektrum
- **Location:** Capellen, Luxembourg
- **Posted:** 2024-03-25
- **Last confirmed live:** 2026-09-10
- **Apply:** https://spektrum-group.com/jobs?gh_jid=4311518101

## Job description

Introduction

NSPA are looking for engineers to support their Cyber Security infrastructure to covering day to day and project activities, in addition providing Cyber Security services to NSPA customers or partners from across the NATO nations.

Day to Day Activities

- Planning and carrying out the replacement of products or technologies within the infrastructure. This will involve developing time schedules, collaborating with the helpdesk, communicating with the customers, configuring the new equipment and performing the actual migration work. Following this, documentation and diagrams will have to be updated.
- Operating and maintaining a wide variety of different cyber security solutions on a day-to-day basis, including but not limited to: Network firewall, web proxy, mail proxy and anti-spam, antivirus for servers, DMZ segregation, web application firewall, intrusion prevention, SIEM log correlation and reporting, managed file transfer, certificates, strong authentication etc.
- Providing support on various cyber security tasks and operations, such as incident response, troubleshooting, change management, write and implement security procedures for operating security solutions, lifecycle management, security and risk assessments, etc.

Project Activities

- Assessment of new cyber security products or technologies. This will involve researching the product, liaising with the manufacturer, arranging for a lab trial, conducting a test phase and then writing a report and making recommendations to NSPA.
- Design and implementation of new secure solutions for various projects and to ensure that NSPA Cyber Security posture remains adequate and aligned with best practices.
- Operating effectiveness testing and improvement of existing cyber security controls involving various cyber security technologies (including but not limited to network firewalls, Web Application firewalls, SIEM, Network IPS, e-mail protection, web browsing protection, Public Key Infrastructure, Medium and Strong authentication, etc.).
- Cyber Security advisory and support provided for various customer projects.
- Cyber Security penetration testing project.

Working Location

- Main working location: Capellen, Luxembourg (NSPA HQ)
- Some projects may require business travel to other sites
- Some remote/hybrid work may be required

Working Hours

- Monday to Thursday:
- Arrival 06:00 to 09:00
- Lunch break Minimum 30 minutes 11:45 – 13:45
- Departure 16:15 to 20:00
- Friday
- Arrival 6:00 to 9:00
- Departure 12:15 to 17:00
- Public Holiday of Luxenberg will be applicable
- Some on-call duties and weekend work will be required on a rotation basis

Project Duration

- 3 years + 2 Years

Mandatory Requirements

- Professional Experience
- Proven experience of at least 5 years in IT Cyber Security.
- Proven experience of at least 1 year in a NATO environment.
- Proven experience and skills (Minimum 8 of the below)
- Next Generation Firewalls (including Intrusion Detection/Prevention System),
- Web Application Firewalls and Reverse Proxies,
- Web Proxies
- E-mail gateways
- Vulnerability Management
- Anti-malware, sandboxing and endpoint protection technologies
- Public Key Infrastructures (PKIs), smartcards and user authentication technologies
- Mobile Device Management (MDM)
- Apple infrastructure and iOS management
- Security Incident Event Management (SIEM)
- Multi-Factor authentication
- Privileged Access Management
- Good Knowledge - Ability to troubleshoot and solve issues involving the aforementioned technologies
- Skills
- Good Knowledge - Web application penetration testing
- Good Knowledge - Mobile application penetration testing
- Good Knowledge - Source code vulnerability analysis
- Good Knowledge - Ability to identify and exploit web vulnerabilities  (XSS, CSRF, SQLi, SSRF, arbitrary file upload, etc.)
- Good Knowledge - Ability to identify and exploit mobile vulnerabilities  (API issues, insecure storage, memory corruption, deep links, etc.)
- Good Knowledge - Network penetration testing experience
- Good Knowledge - Protocol analysis
- Good Knowledge - CTF experience
- Good Knowledge - Secure coding practices
- Good Knowledge - Cryptography
- Good Knowledge - Red and Blue team experience
- Proven knowledge of
- Good Knowledge - Cloud Architecture and Security
- Good Knowledge - Operating System (Windows and Linux) security and of Active Directory security
- Good Knowledge - Networking protocols
- Good Knowledge - Application Security
- Experience allowing to write scripts efficiently - Programming Skills in Bash or Python or Perl
- Good Knowledge - Offensive security tactics, techniques, tools and procedures
- Triage, following, procedures pro-active pivoting and hunting - Handling security alerts (ex: antivirus alert, suspicious email report)
- Good Knowledge - Handling security incident/intrusion
- Language
- Proficiency in English, written and oral, equivalent to CEFR B2 or higher
- Ability to write clear and concise reports and technical documentation with proper justification
- Ability to explain issues at different levels of the hierarchy and in particular to management
- Security Clearance
- Hold a valid NATO SECRET (or higher) security clearance

## About Spektrum

## Company Overview
- **One-liner**: Spektrum Group is a specialist consultancy that enables clients to navigate the complex defence, humanitarian, and government markets by connecting them with a fast-growing global network of subject matter experts, partners, and suppliers.
- **Entity Type**: Private (stage not disclosed; no public funding rounds identified)
- **Headquarters**: Multiple offices; global presence with registered addresses in Spain (Barcelona, ES: +34 932 712 919), the United Kingdom (Leeds, UK: +44 113 868 3500), Belgium (Mons), the Netherlands (The Hague), the United States (Norfolk, VA), and Norway (Stavanger). No single global HQ is explicitly designated.
- **Founded**: Not publicly available
- **Founders**: Not publicly available

## Core Business
- **Industry/Industries**: Aerospace & Defence, Humanitarian Aid, Government Services, Consulting & Advisory
- **Target Customers**: International institutional organisations (e.g., UN, NATO), English-speaking national governments, and ministries of defence (apex purchasers), as well as the broader defence ecosystem (from small specialists to global enterprises)
- **Mission / Purpose**: “Thinking differently to make a difference” – Spektrum aims to solve today’s aerospace and defence market problems, acting as a force for good with a sincere intent to positively impact its clients and their teams.

## Products & Services
- **Consulting**: Strategic advisory, market navigation, and subject matter expertise for clients aiming to achieve aerospace and defence objectives.
- **Logistics and Supply**: Supply chain support and logistics management tailored to complex defence and humanitarian environments.
- **Communication**: Strategic communication services, including social media scripting and event promotion (as evidenced by job postings for Social Media Scripter).
- **Events**: Planning and execution of events for defence, humanitarian, and government stakeholders.

*Additional note:* Spektrum Labs (a related entity) is described as “building the backbone of the cyber resilience ecosystem, unifying cybersecurity, compliance, and insurance into one seamless platform powered by AI, cryptography, and automation,” but Spektrum Labs appears to be a separate brand under the Spektrum umbrella.

## Market Standing
- **Valuation / Market Cap**: Not publicly available (private company)
- **Key Metric**: Unspecified revenue; total funding not disclosed. However, rapid hiring (112+ open roles listed on Built In) suggests strong growth and demand.
- **Notable Investors / Partners**: Not publicly disclosed. The company states it is a “Member Of” unspecified organisations, a “Registered supplier to” key entities, and holds certifications (logos visible on website but not named in the provided results).
- **Growth Signals**:
  - Fast-growing global network of partners and suppliers
  - 112+ job openings across multiple countries and disciplines (engineering, IT, talent acquisition, contract management, assurance, etc.)
  - Offices in at least six countries (Spain, UK, Belgium, Netherlands, USA, Norway)

## Competitive Advantages
- **Deep Niche Expertise**: Focus exclusively on the challenging and complex defence, humanitarian, and government sectors, an area many traditional consultancies avoid.
- **Global Network**: Extensive ecosystem of subject matter experts, partners, and suppliers that can be rapidly deployed to solve client problems.
- **Apex Payer Focus**: Directly targets the highest-level purchasers within institutional organisations and ministries of defence.

## Strategic Focus
- Priority is to help clients navigate the increasingly complex landscape of international defence and government procurement.
- Emphasis on building a “resilient and effective” supplier ecosystem through diversity and capability.
- Continuous improvement of internal processes and client support, with a culture of questioning everything to drive growth.

## Why Work Here
- **Culture Highlights**: Values include transparency, effective communication, enthusiasm and fun, and setting ambitious yet realistic goals. Employees celebrate successes together and maintain a friendly, relaxed environment.
- **Work Policy**: Hybrid workspace is available, with some roles offering a combination of remote and on-site work, while others (e.g., in The Hague, Brussels, Norfolk) are labeled “In-Office” on Built In. Policy likely depends on role and location.
- **Notable Perks / Engineering Culture**: Not explicitly described, but career growth is supported by a wide range of senior and junior roles. The company places “great emphasis on supporting and collaborating with our team and clients.” Spektrum Labs’ focus on AI, cryptography, and automation indicates a forward-leaning engineering culture in the cybersecurity arm.

## Sources
1. [Spektrum Group – Official Website](https://spektrum-group.com/)
2. [Spektrum Group – About Us](https://spektrum-group.com/about-us)
3. [Spektrum Group – What We Do](https://spektrum-group.com/what-we-do)
4. [Spektrum Group – Jobs Page](https://spektrum-group.com/jobs)
5. [Built In – Spektrum Group Careers & Culture](https://builtin.com/company/spektrum-group)
6. [Spektrum Group – Greenhouse Careers Page](https://job-boards.greenhouse.io/spektrum)

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