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Consultant, Application Security Penetration Tester

Job in Paisley, Renfrewshire, PA1, Scotland, UK
Listing for: Coalfire
Full Time position
Listed on 2026-02-16
Job specializations:
  • IT/Tech
    Cybersecurity, IT Consultant
Job Description & How to Apply Below

Consultant, Application Security Penetration Tester

This range is provided by Coalfire. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

About Coalfire

Coalfire is on a mission to make the world a safer place by solving our clients’ hardest cybersecurity challenges. We work at the cutting edge of technology to advise, assess, automate, and ultimately help companies navigate the ever-changing cybersecurity landscape. We are headquartered in Chicago, Illinois with offices across the U.S. and U.K., and we support clients around the world.

But that’s not who we are – that’s just what we do.

We are thought leaders, consultants, and cybersecurity experts, but above all else, we are a team of passionate problem-solvers who are hungry to learn, grow, and make a difference.

The Consultant works closely with Project Managers, Delivery Directors, and other Delivery team members to lead engagements, assessing the security of various types of client applications and supporting infrastructure against security best practices. The Consultant is a technical leader with broad technical skills, meeting the objectives of their engagements, collaborating with clients, mentoring teammates, and providing subject matter expertise across one or more technical domains.

The Consultant is a trusted advisor to clients, and through objective testing and results reporting, supports the client in making well-informed, risk-based decisions to improve overall security posture.

What You'll Do
  • Working independently and collaboratively with a team to both lead and support
  • Perform penetration testing on applications with complex technology stacks from both a Blackbox & Whitebox perspective
  • Dynamically flex your skills when assessing emerging or custom technologies
  • Contextualize vulnerabilities and assess realistic impact to a client accounting for mitigating and aggravating factors
  • Manage priorities and tasks to achieve utilization targets
  • Operate with professionalism both internally and with clients
  • Ensure quality reports and services are delivered efficiently and on time
  • Maintains strong depth of knowledge in the practice area
  • Collaborate with project managers, quality management, sales and other delivery team members to drive customer satisfaction and meet project deliverables
  • Up to 10% travel
What You'll Bring
  • Application penetration testing and assessment tradecraft and methodologies (including browser-based, API)
  • Strong working knowledge of at least two programming or scripting languages
  • Strong understanding of security principles and industry best practices
  • Minimum of 2 years' experience in a consulting/professional services role
  • Minimum of 2 years' experience in Application Security and/or Software Development
  • Proficiency in Web Application Penetration Testing
  • Strong overall technical skills, with strong expertise in at least one of the following:
  • Mobile Application Penetration Testing
  • Thick Application Penetration Testing
  • Hardware Penetration Testing
  • Secure Code Review
  • Container Penetration Testing
  • Cloud Penetration Testing
  • Network Active Directory Penetration Testing
  • AI Penetration Testing
  • Strong consulting skills including:
  • Time management, performing adjacent tasks while ensuring on-time delivery, escalating issues as needed
  • Verbal communication, leading client calls for project kickoffs and debrief
  • Written communication & Report writing, for both executive audiences and technical staff
  • High school diploma required
Bonus Points
  • UK CREST Certification and eligibility to be approved for and maintain UK SC level Clearance
  • Strongly preferred CREST Certifications
  • CREST Practitioner Security Analyst (CPSA)
  • CREST Practitioner Threat Intelligence Analyst (CPTIA)
  • AWAE, OSCP, OSCE, OSEE offensive security certifications
  • Significant development and engineering backgrounds
  • Cloud Service penetration testing tradecraft and methodologies across multiple service providers (e.g. AWS, GCP, etc.)
  • Mobile platform and application penetration testing tradecraft and methodologies across both iOS and Android
  • Red/Purple Team tradecraft and methodologies
  • Social engineering in all its forms
  • AWS Certified Solutions Architect…
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