Lead Web App Pen Tester

Lead Web App Pen Tester

Job Description

CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world’s real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives.

We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We’ve continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors.

We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.

In this role, you will secure software and applications that power the worldwide real estate market. Work with 1,000+ software, QA, and operations engineers to secure applications during design, development, and production. The candidate will utilize threat modeling, white box application security analysis, and grey box penetration testing. This position will collaborate with software development teams, Dev Ops, and security to drive and shape the way our employees and engineers build, deploy, and operate applications.

This position is located in Arlington, VA or Richmond, VA and is in office Monday through Thursday and work from home on Friday.

• Conduct penetration tests on web applications and underlying infrastructure for vulnerabilities using both manual and automated techniques
• Demonstrate risk of detected issues to both technical and non-technical audiences
• Work with the software and product teams to help ensure applications are designed and implemented securely during the SDLC
• Consume a variety of application security tools (DAST, SAST, SCA, Credential Scanning, IAC scanning) to secure web applications during development and production run-time
• Utilize sustainable methods to automate finding feedback to generate developer work items and trigger re-scan when associated work items are closed
• Recommend code changes to eliminate vulnerabilities
• Automate security testing at various stages within the CI/CD pipeline

• Bachelor’s Degree required from an accredited, not for profit university or college (preferably in Computer Science/Cybersecurity)
• A track record of commitment to prior employers
• 5+ years total experience in a technical role with at least 3+ year of professional experience penetration testing
• Experience with web application penetration testing, identifying and exploiting attack chains to evaluate the severity of vulnerabilities within a web application
• Experience writing comprehensive reports that clearly demonstrate the risk of vulnerabilities to developers and technical leadership
• Experience with defense-in‑depth strategies to help mitigate existing risk within applications
• Experience with common programming language: C# (preferred), Java, C/C++, Python, or Go
• Scripting/programming skills - Python, Power Shell, GoLang, Perl, JavaScript, .NET, API Integration
• Security tooling automation in CI/CD pipelines and IDE interfaces including Static Application Security Testing (SAST) and Static Application Analysis (SCA) solutions such as Veracode, Check Marx, App Scan, X‑Ray, Synopsys, or Snyk
• Dynamic application security testing (DAST) through Metasploit, Burp Suite, OWASP ZAP, Acunetix, etc.
• Industry relevant professional certifications such as:
• Offensive Security Web Assessor (OSWA) / Expert (OSWE)
• Offensive Security Certified Professional (OSCP) / Experienced (OSEP)
• Hack the Box Bug Bounty Hunter (CBBH) / Web Exploitation Expert (CWEE)
• Hack the Box Penetration Testing Specialist (CPTS) / AD Pentesting Expert (CAPE)
• INE Security Web Application Penetration Tester eXtreme (eWPTX)
• Those certifications can…