Security Engineer Intern - Arlington, VA

CoStar Group, Inc.; Arlington (VA); Hybrid; USD 55,000 - 62,000; Full time

Job summary

CoStar Group in Arlington, VA is seeking a Security Engineering Intern to gain hands-on experience within a large enterprise cybersecurity program, covering vulnerability management, endpoint security, threat detection, and security controls.

You will work across three workstreams, develop a prototype, respond to alerts, analyze findings, and learn from mentors in a collaborative, fast-paced environment.

Qualifications

• Pursuing a bachelor’s degree in Cybersecurity, CS, IT, Software Engineering, or similar.
• Must plan to return to school after Summer 2027 internship.
• GPA 3.0+ cumulatively.
• Strong interest or experience in cybersecurity through projects or coursework.
• Able to commit to 10-week, 40-hour per week internship.

Responsibilities

• Develop a working prototype to solve a cybersecurity challenge.
• Assist in cybersecurity operations: respond to alerts, analyze findings, tune controls.
• Support a cybersecurity project under mentor guidance.
• Gain exposure to vulnerability management, endpoint security, threat detection, and cloud security.

Skills

Cybersecurity interest

Written & verbal communication

Analytical thinking

Troubleshooting skills

Education

Bachelor's degree in Cybersecurity/CS/IT/Software Eng or related

Tools

Python

PowerShell

Bash

Job description

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: 1. Develop a working prototype to solve a cybersecurity challenge. 2. Perform cybersecurity operations such as responding to alerts, analyzing findings, or tuning controls. 3. 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 program. This internship is designed to provide exposure to the types of work performed by Security Engineers and help prepare students for future careers in cybersecurity. This position is located in Arlington, VA and offers a schedule of Monday to Thursday in office and the option to work from home on Friday.

Technologies & Security Areas You May Explore

• Vulnerability scanning and vulnerability management tools
• Endpoint security technologies
• Security monitoring and incident response processes
• Security tool integrations and automation
• Identity and access management concepts
• Cloud and infrastructure security concepts
• Scripting and automation using Python, PowerShell, Bash, or similar technologies
• AI security and emerging cybersecurity technologies

Basic Qualifications

• Currently pursuing a bachelor’s degree from an accredited, not-for-profit university or college in Cybersecurity, Computer Science, Information Technology, Software Engineering, or a comparable major.
• Must be planning to return to school following the completion of the Summer 2027 internship.
• Must have an expected graduation date of December 2027 - June 2028.
• Minimum 3.0 cumulative GPA.
• Demonstrated interest in cybersecurity through personal endeavors outside of undergraduate degree program.
• Available to participate in the full 10-week summer internship program and commit to a 40-hour work week throughout the internship.
• Coursework, project, internship, research, or work experience related to cybersecurity, networking, operating systems, cloud computing, scripting, automation, system administration, or comparable technical disciplines.
• Ability to communicate technical information clearly in written and verbal formats.
• Strong analytical, troubleshooting, and problem-solving skills.

Preferred Qualifications and Experiences

• Ability to describe cybersecurity concepts such as vulnerability management, endpoint security, network security, authentication, access controls, or incident response.
• Exposure to scripting or automation using Python, PowerShell, Bash, or similar languages.
• Familiarity with Windows, Linux, networking, or cloud environments.
• Demonstrated initiative through cybersecurity projects, coursework, research, clubs, competitions, or extracurricular activities.
• Experience collaborating on academic, project, research, or team-based work.
• Exposure to AI, machine learning, automation, or AI security concepts through coursework, projects, internships, or personal learning.
• Security certifications or coursework such as Security+, Network+, CySA+, or comparable cybersecurity training are a plus.

What’s in it for you?

When 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.

Base Compensation: $40 - $45 (Hourly)

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.

Equal Employment Opportunity

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing.

Founded in 1987, CoStar Group, Inc. (Nasdaq:CSGP) is the leading provider of commercial real estate information, analytics and online marketplaces.

CoStar conducts expansive, ongoing research to produce and maintain the largest and most comprehensive database of commercial real estate information. CoStar data powers the $17 trillion world of real estate – delivering the sale, lease, property, tenant, contact, reporting and industry information that makes connections happen. We help our clients make smart investments and decisions. Eighty-three percent of the nation’s commercial real estate transactions involve a CoStar subscriber, and the top 95% of the leading 1,000 brokerage firms use CoStar to inform their decisions. We also help create lasting experiences through our family of marketplaces. In addition to CoStar, CoStar Group brands and marketplaces include LoopNet, Apartments.com, BizBuySell, and Lands of America – collectively attracting more than 25 million monthly unique visitors. The Apartments.com Network is the nation’s #1 most visited apartment listing network, with 45 million monthly visits, allowing renters to find their perfect homes. LAND.com connects landowners to their perfect properties, spots and open spaces. BizBuySell allows small business owners to bring their dreams to life. And LoopNet connects investors, sellers and brokers with clients who fall in love with their properties.

Headquartered in Washington, DC, CoStar maintains offices throughout the U.S. and in Europe and Toronto, Canada with a staff of approximately 3,700 worldwide, including the industry's largest professional research organization. CoStar is committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. CoStar is also committed to compliance with all fair employment practices regarding citizenship and immigration status. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access www.costargroup.com/careers as a result of your disability. You can request reasonable accommodations by calling 1-855-840-1715 or by sending an email to [e-mail].