Penetration Tester

Ultima Group; Reading; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading technology company in the UK is seeking an ambitious Penetration Tester to join their Security Testing Practice. You will deliver high-quality penetration tests, identify vulnerabilities, and contribute to continuous improvement. Required qualifications include hands-on experience in penetration testing, familiarity with security tools, and strong communication skills. The role offers competitive pay and a comprehensive benefits package, including generous holiday and parental leave policies.

Benefits

25 days’ holiday (rising to 27) plus bank holidays

2 volunteering days and 1 personal day

Life assurance

Enhanced parental leave

Cycle to Work scheme

Qualifications

• 2+ years of experience in penetration testing or equivalent practical experience.
• Eligibility to obtain and maintain UK security clearances.
• Hands-on experience in IT Health Check delivery.

Responsibilities

• Support the delivery of IT Health Checks and penetration tests.
• Identify vulnerabilities and provide recommendations to clients.
• Work closely with senior consultants to share insights.

Skills

Hands-on experience in penetration testing

Penetration testing tools

Understanding of network protocols

Ability to translate technical findings

Familiarity with common web application vulnerabilities

Education

CREST Practitioner Security Analyst (CPSA)

CREST Registered Tester (CRT)

Cyber Scheme Team Member (CSTM)

Tools

Burp Suite

Nmap

Nessus

Metasploit

Job description

Are you an ambitious cybersecurity professional with a passion for uncovering vulnerabilities and strengthening digital defences?

Join Ultima’s Security Testing Practice as a Penetration Tester and play a key role in protecting our clients’ critical systems. Working alongside experienced consultants, you’ll deliver high-quality penetration testing engagements, contribute to continuous improvement, and grow your expertise in a collaborative, knowledge-sharing environment.

What you’ll be doing

Maintain your penetration testing qualifications and continue developing your technical expertise in line with business and client needs.

Deliver Quality Testing

Support the delivery of IT Health Checks and penetration tests, identifying vulnerabilities and providing clear, actionable recommendations to clients.

Collaborate and Learn

Work closely with senior consultants, sharing insights and best practices while contributing to a strong culture of learning within the Security Testing Practice.

Develop Broad Expertise

Expand your skill set to deliver a range of security testing services that support evolving business and client requirements.

You’ll also:

• Be passionate about the full security lifecycle
• Engage confidently with both technical and non-technical stakeholders
• Demonstrate curiosity, adaptability, and a solution-focused mindset
• Translate complex technical findings into clear, accessible reports

What we’re looking for

• Hands‑on experience in penetration testing or IT Health Check delivery
• A current penetration testing qualification such as:
• CREST Practitioner Security Analyst (CPSA)
• CREST Registered Tester (CRT)
• Cyber Scheme Team Member (CSTM)
• 2+ years’ penetration testing experience (or equivalent practical experience)
• Eligibility to obtain and maintain UK security clearances
• Familiarity with common tools such as Burp Suite, Nmap, Nessus, Metasploit, etc.
• Understanding of network protocols (TCP/IP, OSI model) and common web application vulnerabilities

Our values

At Ultima, you will live and breathe our values of Commitment, Collaboration, Inclusion, Innovation, and Inspiration.

We offer competitive pay alongside a comprehensive benefits package, including:

• 25 days’ holiday (rising to 27) plus bank holidays
• 2 volunteering days and 1 personal day
• Life assurance
• Enhanced parental leave
• Cycle to Work scheme
• And more

About Ultima

Transforming technology into meaningful outcomes.

Ultima is a leading technology and managed services provider, helping organisations realise the full value of their IT investments. With deep expertise across security, cloud, data, and digital workplace solutions, we partner with customers to deliver secure, innovative, and impactful outcomes.

Learn more at www.ultima.com

Ultima is proud to be an equal opportunity employer, committed to building a diverse, inclusive, and equitable workplace where everyone can thrive.