Pentester

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Role Overview

Cyber Defence is a fast-growing cybersecurity company on a mission to protect digital assets and build client trust through robust, ethical, and forward-thinking cyber practices. From our office in Pueblo Nuevo, we serve clients across the UK, Spain, and beyond, working with CREST-certified practices and delivering government-grade security services.

What You’ll Be Doing

As a Pentester at Cyber Defence, you'll play a key role in simulating attacks to identify system vulnerabilities across networks, applications, and cloud infrastructure. This is a hands‑on technical role with a strategic impact on our clients' resilience and regulatory compliance.

Key Responsibilities

  • Plan and execute manual and automated penetration tests across web apps, networks, and APIs.
  • Perform internal and external vulnerability assessments.
  • Create comprehensive reports on findings with clear mitigation guidance.
  • Collaborate with SOC Analysts, DevSecOps, and IT teams to implement remediations.
  • Stay updated on the latest attack vectors and security research.
  • Support Red Team and Purple Team exercises.
  • Assist with incident response investigations when needed.

Skills and Qualifications

Must-Haves

  • 3+ years of experience in penetration testing or offensive security.
  • Strong understanding of common vulnerabilities (OWASP Top 10, MITRE ATT&CK).
  • Proficiencyin tools such as Burp Suite, Nmap, Metasploit, Nessus, and Wireshark.
  • Experience with scripting languages (Python, Bash, PowerShell).
  • Excellent written and verbal communication (English).
  • Eligibility to work in Spain and occasional travel if required.

Nice-to-Haves

  • CREST CRT or equivalent (OSCP, OSWE, CEH, etc.).
  • Experience with cloudpentesting(AWS, Azure, GCP).
  • Familiarity with compliance standards (ISO 27001, GDPR, NIST, PCI DSS).
  • English & Spanish language skills.

OUR BENEFITS

  • Be part of a mission-driven cybersecurity firm with global impact.
  • Work alongside CREST-certified experts and forward-thinking leadership.
  • Professional development budget & certification support.
  • On-site work with flexibility (based out of Pueblo Nuevo office).
  • Vibrant office culture near the coast – good vibes only!

#J-18808-Ljbffr”, “datePosted”: “2026-03-22”, “hiringOrganization”: { “@type”: “Organization”, “name”: “CyberDefence”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__391030008__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=33683” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “South Cambridgeshire” } } }
Company: CyberDefence
Apply for the Pentester
Location: South Cambridgeshire
Job Description:

Role Overview

Cyber Defence is a fast-growing cybersecurity company on a mission to protect digital assets and build client trust through robust, ethical, and forward-thinking cyber practices. From our office in Pueblo Nuevo, we serve clients across the UK, Spain, and beyond, working with CREST-certified practices and delivering government-grade security services.

What You’ll Be Doing

As a Pentester at Cyber Defence, you’ll play a key role in simulating attacks to identify system vulnerabilities across networks, applications, and cloud infrastructure. This is a hands‑on technical role with a strategic impact on our clients’ resilience and regulatory compliance.

Key Responsibilities

  • Plan and execute manual and automated penetration tests across web apps, networks, and APIs.
  • Perform internal and external vulnerability assessments.
  • Create comprehensive reports on findings with clear mitigation guidance.
  • Collaborate with SOC Analysts, DevSecOps, and IT teams to implement remediations.
  • Stay updated on the latest attack vectors and security research.
  • Support Red Team and Purple Team exercises.
  • Assist with incident response investigations when needed.

Skills and Qualifications

Must-Haves

  • 3+ years of experience in penetration testing or offensive security.
  • Strong understanding of common vulnerabilities (OWASP Top 10, MITRE ATT&CK).
  • Proficiencyin tools such as Burp Suite, Nmap, Metasploit, Nessus, and Wireshark.
  • Experience with scripting languages (Python, Bash, PowerShell).
  • Excellent written and verbal communication (English).
  • Eligibility to work in Spain and occasional travel if required.

Nice-to-Haves

  • CREST CRT or equivalent (OSCP, OSWE, CEH, etc.).
  • Experience with cloudpentesting(AWS, Azure, GCP).
  • Familiarity with compliance standards (ISO 27001, GDPR, NIST, PCI DSS).
  • English & Spanish language skills.

OUR BENEFITS

  • Be part of a mission-driven cybersecurity firm with global impact.
  • Work alongside CREST-certified experts and forward-thinking leadership.
  • Professional development budget & certification support.
  • On-site work with flexibility (based out of Pueblo Nuevo office).
  • Vibrant office culture near the coast – good vibes only!

#J-18808-Ljbffr…

Posted: March 22nd, 2026