About the role#
As a Security Engineer Intern, you will gain hands-on experience within a large enterprise cybersecurity program. You will work alongside experienced team members to learn modern security practices and contribute to real-world technical challenges. Each intern is paired with a dedicated mentor to support technical development and career growth throughout the 10-week program.
What you'll do#
- Develop a working prototype to solve a specific cybersecurity challenge.
- Perform cybersecurity operations, including responding to alerts, analyzing findings, and tuning security controls.
- Assist in ongoing cybersecurity projects to build a foundation in the field.
- Explore technologies including vulnerability management, endpoint security, incident response, and cloud infrastructure.
What you'll need#
- Currently pursuing a bachelor’s degree in Cybersecurity, Computer Science, Information Technology, Software Engineering, or a comparable major at an accredited, not-for-profit institution.
- Expected graduation date between December 2027 and June 2028.
- Planning to return to school following the completion of the Summer 2027 internship.
- Minimum 3.0 cumulative GPA.
- Demonstrated interest in cybersecurity through personal endeavors, projects, research, or extracurricular activities.
- Coursework or experience related to networking, operating systems, cloud computing, scripting, or system administration.
- Strong analytical, troubleshooting, and problem-solving skills.
- Ability to communicate technical information clearly in written and verbal formats.
- Commitment to a 40-hour work week for the full 10-week summer program.
Location & details#
- Location: Arlington, Virginia.
- Term: Summer 2027.
- Modality: Hybrid (Monday to Thursday in office, with the option to work from home on Friday).
- Employment: This is a full-time, paid internship. CoStar Group does not provide visa sponsorship for this position.
About CoStar Group
CoStar Group provides information, analytics, and online marketplaces for the commercial and residential real estate sectors. The company operates digital platforms including Apartments.com, LoopNet, and Homes.com. It also offers spatial data technology and hospitality benchmarking services. Based in Arlington, Virginia, the firm employs between 5,001 and 10,000 people.
How to get in at CoStar Group
Applying early is a significant advantage at CoStar Group, as recruiters often review the first wave of candidates before the applicant pool grows. Intern Insider sends an instant alert the moment a role matching your target is published, helping you get your materials in front of hiring managers before the pile grows. You can use this to your benefit by preparing your application materials in advance. Reaching out to the recruiters behind these roles can materially improve your response rates compared to submitting into a general queue. Intern Insider surfaces the specific recruiters behind company roles so you can contact them directly to ask about the position or a potential referral. This direct approach often provides more clarity on the team and the expectations for the internship.



