Security Engineer Intern - Arlington, VA

CoStar Group
Arlington, Virginia, United StatesPosted Sep 14, 2026
Software Engineering

About the role

Security Engineer Intern - Arlington, VA

Job Description

Company Overview

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, 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. Learn more about CoStar.

Role Description

We are seeking a Security Engineering Intern to join our team, where you'll gain hands-on experience in a large enterprise cybersecurity program in areas such as vulnerability management, endpoint security, threat detection, security controls, and emerging areas such as AI security. CoStar Group’s Security Engineering internship program provides hands-on experience through three workstreams:

  • Develop a working prototype to solve a cybersecurity challenge.
  • Perform cybersecurity operations such as responding to alerts, analyzing findings, or tuning controls.
  • Assist in a cybersecurity project while learning from experienced team members and building a foundation in modern cybersecurity practices.

Each intern is paired with a dedicated mentor to support technical development, career growth, and day-to-day learning throughout the pr

Similar internships