Senior Offensive Security Engineer&lt;br&gt;Job Description&lt;br&gt;Offensive Security EngineerOverviewCoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces.  Included in the S&amp;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. This extensive experience gives 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.   Evolve our offensive security capabilities to test our internal and external facing processes, infrastructure, and applications. This position will be tasked with developing test plans to validate identified vulnerabilities and demonstrate the exploitation of the vulnerabilities. The ability to explain the exploit to senior level management is key to success in this role.  Stay current with trends, techniques, and tools used by adversaries.This position is located in Arlington, VA and is in office Monday through Thursday with work from home on Friday.Responsibilities <ul><li>Lead purple team activities in collaboration with our threat management and defensive blue teams including adversary emulation and the validation of detective, defensive, and vulnerability controls</li><li>Plan and oversee external red team engagements with external partners</li><li>Oversee and mentor other offensive security team members. Share knowledge with all members of the security team</li><li>Oversee all internal penetration testing efforts as both a player and a coach to other penetration testing engineers to cover penetration testing of all critical infrastructure (ie CI/CD systems, Active Directory)</li></ul>Basic Qualifications<ul><li>Bachelor’s Degree required from an accredited, not for profit university or college (preferably in a relevant field - Computer Science/Cyber Security)</li><li>A track record of commitment to prior employers </li><li>3 years of experience performing offensive security activities such as red teaming, penetration testing, and vulnerability research</li><li>6 years of total experience in a technical role such as security, networking, systems, or software development</li><li>Security certification such as OSEP, OSCP, CRTO, GXPN or similar certification</li><li>Scripting/programming skills (Bash, Python, PowerShell)</li><li>Experience planning and executing Red Team and Purple Team Scenarios</li></ul>Preferred Qualifications and Skills<ul><li>Using security tools like NMAP, Burp Suite, Kali Linux, Bloodhound, and similar tools</li><li>Experience with C2 Frameworks like Cobalt Strike, Sliver, and Mythic</li><li>Windows Active Directory exploitation tools and techniques</li><li>Knowledge of payload and exploit development (C/C#/C++)</li><li>Understanding of EDR systems and how to evade them</li></ul>What’s in it for YouWhen you join CoStar Group, you’ll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed.We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement.Our benefits package includes (but is not limited to):<ul><li>Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug</li><li>Life, legal, and supplementary insurance</li><li>Virtual and in person mental health counseling services for individuals and family</li><li>Commuter and parking benefits</li><li>401(K) retirement plan with matching contributions</li><li>Employee stock purchase plan</li><li>Paid time off</li><li>Tuition reimbursement</li><li>On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes</li><li>Access to CoStar Group’s Diversity, Equity, &amp; Inclusion Employee Resource Groups</li><li>Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks</li></ul>We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply.  However, please note that CoStar Group is not able to provide visa sponsorship for this position.#LI-AR&lt;br&gt;CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing

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