Senior Penetration Tester

CyberNorth; United Kingdom; Remote; GBP 70,000 - 110,000; Full time

Job summary

RMT Accountants & Business Advisors Ltd is seeking a Lead Penetration Tester with 5+ years of experience to lead client engagements and advance our Cyber Security practice. You will oversee penetration testing across infrastructure, web apps and cloud, deliver assessments and high-quality reports, and mentor junior consultants.

You’ll work with clients on security reviews aligned to recognised frameworks and help shape service offerings while staying ahead of emerging threats and best practices.

Qualifications

• Minimum five years’ experience delivering penetration testing engagements.
• Experience with external, internal and web app penetration testing.
• Ability to produce high-quality technical and executive reports.

Responsibilities

• Lead and deliver infrastructure, web app and cloud security penetration testing engagements.
• Conduct Cyber Essentials and Cyber Essentials Plus assessments.
• Deliver technical security reviews and vulnerability assessments.
• Produce high-quality reports with remediation guidance.
• Mentor and support junior consultants to develop technical capability.
• Develop testing methodologies, tools and service offerings.
• Support pre-sales activities and client presentations.

Skills

Penetration testing

External/internal/web app tests

Security assessments

Report writing

Communication skills

Client relations

Threat awareness

Education

CREST CRT

OSCP

CHECK Team Member

CSTM

Tools

Burp Suite Pro

Nessus

Qualys

OpenVAS

Nmap

Metasploit

Kali Linux

Job description

EMPLOYER: RMT Accountants & Business Advisors Ltd

In 2023, RMT became part of Sumer Group – a collaboration of renowned regional accountancy practices with a shared vision to champion local small to medium-sized enterprises.

By bringing together the best in advisory & business services, Sumer Group retains the value that community-based practices offer and combines this with the scale, breadth of expertise and technologies that only a national organisation can muster. Through our unique approach, we believe we can make a real positive impact and achieve growth for our company, our colleagues and our clients. Together, we are about doing the right things, putting people first and delivering the best possible services to those who sit at the heart of our economy and communities.

We are seeking an experienced Lead Penetration Tester to join our growing Cyber Security practice. With a minimum of five years’ experience delivering penetration testing and technical security assessments, you will play a key role in leading client engagements, developing our service offerings and mentoring junior consultants.

Working closely with the wider RMT Technology IT and Cyber team, you will deliver and oversee a broad range of services including penetration testing, Cyber Essentials Plus assessments, technical information security reviews and security assessments aligned to recognised frameworks such as NIST, ISO 27001 and PCI-DSS.

As a senior member of the team, you will provide technical leadership, assure the quality of assessment outputs, contribute to service development and support client-facing activities. You will maintain awareness of emerging threats, vulnerabilities and best practice to ensure our clients receive practical, risk-based security advice.

Key Responsibilities

• Lead and deliver infrastructure, web application and cloud security penetration testing engagements.
• Conduct Cyber Essentials and Cyber Essentials Plus assessments.
• Deliver technical security reviews and vulnerability assessments.
• Produce high-quality technical and executive reports with clear remediation guidance.
• Mentor and support junior consultants to develop technical capability.
• Contribute to the development of testing methodologies, tools and service offerings.
• Support pre-sales activities, proposals and client presentations where required.
• Maintain awareness of emerging threats, vulnerabilities and industry best practice.

Skills, Knowledge & Expertise

• Minimum five years’ experience delivering penetration testing engagements.
• Strong experience conducting external, internal and web application penetration testing.
• Experience conducting technical security reviews and vulnerability assessments.
• Proficiency with tools such as Burp Suite Professional, Nessus, Qualys, OpenVAS, Nmap, Metasploit, Kali Linux and related security testing tools.
• Strong understanding of common attack techniques, vulnerability assessment methodologies and remediation approaches.
• Excellent report-writing and communication skills.
• Ability to explain technical findings to both technical and non-technical stakeholders.
• Strong client relationship and stakeholder management skills.
• Industry-recognised certifications such as CREST CRT, OSCP, CSTM, CHECK Team Member or equivalent.
• Experience with cloud security assessments across Microsoft Azure and Microsoft 365 environments.
• Exposure to SIEM, EDR and security monitoring platforms.
• Understanding of frameworks including NIST CSF, ISO 27001, PCI-DSS and CIS Controls.
• Experience leading teams or mentoring junior consultants.

Belong @ Sumer

At Sumer, we know everyone’s journey is different. That’s why we’re committed to fairness, removing barriers and giving people the support they need to do their best work. If you need any support during the hiring process, just let us know.

Our values represent what matters most to us and guide how we work every day:

• We Shine Together
• We Do the Right Thing
• We Make It Count

We know diverse teams make us stronger. That’s why we’re creating an inclusive workplace where everyone belongs and differences are valued and celebrated.