title-image
Turrior - Let work find you
Recruiters get AI-ranked shortlists and automated outreach, filling roles up to 5× faster.
0%
Popularity
0d
Avg. Time to Hire
0h
Recruiter Res. Time
0%
HR Satisfaction
Careers at CoStar
All open opportunities, right here. Explore, apply, grow.
Apply now

Senior Security Engineer

Full Time
full time
26 Oct 2025

About the job

Senior Security Engineer

<br>

Job Description

<br>

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.   

In this role, you'll communicate and reinforce security concepts to technical and non-technical audiences within the CoStar Enterprise. The ideal candidate will have experience implementing, using and updating standard security software in the areas of vulnerability scanning/management, leading remediation efforts, end-node security, security tool integration and orchestration for incident response.

As the security section grows, so will the tools and the Senior Security Engineer will be the person charged with implementing them. The successful candidate will be a self-starter motivated to learn new technologies and tools and assist in moving security forward as it is implemented within the CoStar Enterprise. 

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

Responsibilities

  • Incident event handling – serve as the escalation tier for the team when there is an incident
  • Lead incident response functions and reporting of findings
  • Review technical security posture (network, application, database) for existing and newly acquired businesses or services
  • Team expert on Mitre Att&ck, tools, techniques, and practices of cyber attackers
  • Ability to script responses to observed threats
  • Perform security review and monitoring of the production environment setup permissions of users, open ports/services and overall network setup
  • Examine network, server, and application logs to determine trends and identify security incidents
  • Use security tools to audit infrastructure, detect issues and coordinate remediation of any issues
  • Conduct threat hunting in the CoStar enterprise
  • Follow, develop and improve network and endpoint security configuration procedures
  • Work with other teams to remediate discovered deficiencies.
  • Participate in 24x7 on-call rotation

Basic Qualifications

  • Bachelor’s Degree required from an accredited, not for profit university or college.  
  • A track record of commitment to prior employers 
  • One or more security certification such as SANS/GIAC, CISSP, CISM, GIAC Certified Incident Handler (GCIH), Certified Expert Incident Handler (CEIH) or equivalent
  • 6+ years in Information Security 
  • Scripting/programming skills (Perl, Python, PowerShell)
  • Experience with Windows Server 2012/2016 /2019 and Active Directory

Preferred Qualifications and Skills

  • Excellent oral and written communication skills to work effectively with others regardless of departmental or geographic boundaries
  • Experience with Microsoft Security tooling (Defender, Sentinel, EOP etc.) a plus
  • Ability to produce detailed technical documentation
  • Proficiency with PC software applications, E-Mail, and job associated applications/systems to expediently process work
  • Requires good organization skills to produce quality work, within required specifications, and within scheduled timelines
  • Excellent customer service skills

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 Diversity, Equity, & Inclusion 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.

#LI-AR

<br>

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

Similar Jobs

10 months ago
6 months ago
Senior Security Engineer
Obsidian Security

End-to-end AI hiring for modern HR teams

Turrior uses artificial intelligence to create job listings, automate candidate screening, conduct video interviews, and apply comprehensive AI scoring — helping companies hire faster, more accurately, and with lower operational costs.

Key benefits:

  • AI-powered job creation and structured job data
  • Intelligent candidate screening and automated shortlisting
  • Video interviews with AI-based answer analysis
  • Comprehensive AI scoring of skills, experience, and role fit
  • Recruitment process automation and reduced time-to-hire

Share job