Web Application and Fraud - Offensive Security Specialist

The Vanguard Group; Malvern (Chester County); Hybrid; USD 120,000 - 160,000; Full time

Job summary

Vanguard is seeking an Offensive Security Analyst on the Web Application & Fraud Testing team. You will conduct threat-driven security testing of Vanguard's client-facing web applications, applying nascent adversarial TTPs to validate controls and inform improvements across the enterprise.

You will design realistic scenarios with defensive teams, assess risk, and provide actionable remediation guidance while mentoring junior staff. Vanguard supports a hybrid work model from Malvern, PA area.

Qualifications

• OSCP/OSWA/OSWE/CWES/GWAPT or equivalent web app testing certs required; CISSP preferred.
• Minimum five years of related work experience, with three in threat analysis.
• Undergraduate degree or equivalent in a related field.
• Experience testing controls and remediating assessment findings.
• Experience assessing production web applications.

Responsibilities

• Design and execute adversarial tests to stress-test fraud detection and response.
• Perform penetration testing, vulnerability assessments and threat modeling.
• Assess risk, apply defensible severity ratings, and communicate impact.
• Mentor and coach junior team members to grow technical skills.
• Lead with IT and business teams to distribute findings and drive remediation.

Skills

Threat analysis

Web application testing

Mentoring

Penetration testing

Vulnerability assessments

Education

Undergraduate degree or equivalent

Tools

OSCP

OSWE

CWES

GWAPT

CISSP

Job description

The Offensive Security Analyst on the Web Application & Fraud Testing team conducts threat-driven security testing of Vanguard's critical client-facing web applications.

This role applies nascent adversarial TTPs to validate whether existing controls detect and prevent the fraud tradecraft currently emerging in the threat landscape.

Findings from this work directly inform detection improvements and control remediation across the enterprise.

Core Responsibilities

• Beyond traditional application testing, this operator will help design and execute realistic scenarios that stress-test cyber fraud detection and response, and partner with defensive teams in exercises to validate that our controls fire when they should.
• Assesses the risk and business impact of identified findings, applying defensible severity ratings based on likelihood, exploitability, and exposure.
• Thinks critically about remediation guidance so that recommendations to partner teams are practical, proportionate to the risk, and address root cause rather than symptom.
• Fosters and supports junior talent through informal leadership and coaching.
• Mentors junior team members to improve their technical acumen.
• Applies emerging adversarial tradecraft against client facing web application infrastructure through rigorous control validation to improve reactive and proactive threat driven operations.
• Conducts penetration testing, vulnerability assessments and threat modeling.
• Evaluates risks and makes recommendations.
• Provides written assessments focused on threats, vulnerabilities, and technologies relevant to Vanguard Infrastructure.
• Leads with IT and business teams to ensure prompt and effective distribution of findings so incidents are effectively addressed.
• Provides department support to the business on enterprise-wide security initiatives and projects.
• Participates in special projects and performs other duties as assigned.

Qualifications

• OSCP, OSWA, OSWE, CWES, GWAPT, PWPP, or equivalent professional level web application testing certification required CISSP preferred
• Minimum of five years related work experience, with three years' experience in threat analysis.
• Undergraduate degree in a related field or the equivalent combination of training and experience.
• Experience testing controls and fostering collaboration in an effort to remediate findings from assessments.
• Experience assessing production web applications.

Special Factors

Sponsorship Vanguard is not offering visa sponsorship for this position.

About Vanguard

At Vanguard, we don't just have a mission—we're on a mission. To work for the long-term financial wellbeing of our clients. To lead through product and services that transform our clients' lives. To learn and develop our skills as individuals and as a team. From Malvern to Melbourne, our mission drives us forward and inspires us to be our best.

How We Work

Vanguard has implemented a hybrid working model for the majority of our crew members, designed to capture the benefits of enhanced flexibility while enabling in‑person learning, collaboration, and connection. We believe our mission-driven and highly collaborative culture is a critical enabler to support long‑term client outcomes and enrich the employee experience. Vanguard, one of the world's leading investment management companies, serves individual investors, institutions, employer-sponsored retirement plans, and financial professionals. We have a diverse and talented crew with a culture that promotes teamwork, along with an unwavering focus on serving our clients' best interests.