Threat Detection Security Engineer

Company: CoStar Group

Location: Arlington, VA (Remote)

Type: Full-time

Remote: Yes

Posted: 2026-04-30

About this role

Threat Detection Security Engineer

Job Description

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 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.

The ideal candidate will balance strong communications skills, understanding of enterprise systems and attacker techniques, and technical skills to improve detection and defense implementations. This position will work in tandem with CoStar’s global cyber threat center team to provide continuous security coverage.

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

Responsibilities

  • Own cyber security incidents from identification to resolution
  • Ensure incidents and corresponding artifacts and evidence are consistently and accurately recorded
  • Work with threat intelligence, detection engineering and security controls team to build a holistic lifecycle around incident preparedness and resolution
  • Operate as a point of escalation for alert triage and provide expert guidance for investigation and inc...

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