Threat Detection Security Engineer
Confirmed on the employer's own hiring board on Oct 12, 2026. First seen by Alion on Jul 1, 2026. CoStar Group scores A on the Alion truth index.
Job Description
Overview
CoStar Group 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.
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 incident resolution
- Own, maintain, and improve the Incident Response Plan and the corresponding processes and procedures
- Team expert on Mitre Att&ck, tools, techniques, and practices of cyber attackers which you use to drive the overall strategy of the incident response team.
- Execute threat hunts in the CoStar enterprise
- Develop and deliver training as well as designing and delivering quarterly tabletop exercises
- Be a security advocate and point of contact for all things incident response through the enterprise.
- Participate in 24x7 on-call rotation
Basic Qualifications
- Bachelor’s Degree required from an accredited, not for profit, in person, university or college.
- A track record of commitment to prior employers
- 4+ years of hands-on security engineering experience
- Excellent documentation and communication skills
- Ability to identify opportunities for automation to increase detection and response efficacy.
- Experience with Microsoft/Azure security tooling
- Experience in scripting with a language such as Python or a low-code automation solution
Preferred Qualifications and Skills
- Experience performing incident response in cloud environments.
- Experience with Kubernetes environments and how to defend/attack them.
- Experience collaborating with threat intelligence and detection engineering
- Ability to work on a cultural diverse team that spans international time zones and foster an environment of inclusions and participation with all team members
- Ability to mentor and train team members to work effectively and adopt new skills.
- Ability to communicate with different levels of leadership across the enterprise to convey risk and drive urgency for risk remediation.
- Experience with Microsoft Security tooling (Defender, Sentinel, EOP etc.) 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.
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):
- Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug
- Life, legal, and supplementary insurance
- Virtual and in person mental health counseling services for individuals and family
- Commuter and parking benefits
- 401(K) retirement plan with matching contributions
- Employee stock purchase plan
- Paid time off
- Tuition reimbursement
- On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes
- Access to CoStar Group’s Employee Resource Groups
- Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
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.
The final salary or hourly rate offered for this role with fall within the range set forth below based on a variety of factors, including but not limited to, geographic location, skills, and competencies.
Base Compensation: 90,000 - 154,000 Annually
CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing