1,952,403open jobs
115,120companies
236,286added this week
Browse all
Salary
$100k – $105k per year
Location
Hybrid (Arlington, United States)
Seniority
Junior
Visa
No sponsorship (stated in the posting)

Confirmed on the employer's own hiring board on Oct 23, 2026. First seen by Alion on Aug 26, 2026. CoStar Group scores B on the Alion truth index.

Overview
Company
Impact
Profile match
CoStar Group is a real estate information, analytics and online marketplace company headquartered in Arlington, Virginia, behind the CoStar database and brands such as LoopNet, Apartments.com, Homes.com, Land.com, Ten-X, BizBuySell, STR, Matterport and OnTheMarket. Founded in 1987 by Andrew Florance, it is listed on NASDAQ and in the S&P 500, with major offices in Richmond, Irvine, London, Paris and Sydney serving brokers, owners, lenders, landlords and home buyers. It hires software, AI and security engineers, field researchers, account executives and sales associates, product marketers, recruiters and finance and lease administration staff.
Associate Security Engineer - 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 uniqueand valuable offerings toour customers. We’vecontinually 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 forour 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:

In this role, you'llsupport the implementation and maintenance of cybersecurity controlsacross CoStar Groupincluding endpoints, identities, cloud platforms, applications, and business processes. You will learnand reinforce security concepts to technical and non-technical audiences while gaining hands-on experience in areas such as vulnerability management, endpoint security, security tool integration, threat detection and response, software security, and emerging areas such as AI security and automation.

Associate Security Engineersassistwith deploying, supporting, and improving security technologies under the guidance of experienced team members. The successful candidate will be a motivated self-starter who is eager to learn new tools, contribute to securityefforts, and help strengthen security practices across the CoStar Enterprise.

This position is located inArlington, VA and offers a schedule ofMonday to Thursday in officeand the optionto work from home on Friday.

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 have an expected graduation date of December 2026 - June 2027.

  • Minimum 3.0 cumulative GPA.

  • Demonstrated interest in cybersecurity through personal endeavors outside of undergraduate degree program

  • At least 2 months of previousrelevant internship or co-op experience.

  • Exposure toscripting or programming languages such as PowerShell, Bash, Python, or similar languages.

  • Ability to troubleshoot technical issues, identifypotential causes, and document findings or recommended next steps.

  • Ability to communicate technical information clearly in written and verbal formats.

  • Ability to follow established processes, document work accurately, and collaborate with technical teams.

Preferred Qualifications and Experiences:

  • Sec+

  • CySA+

  • Security Operation Center experience

  • Ability to describe basic cybersecurity concepts such as vulnerability management, endpoint security, network security, authentication, access controls, or incident response.

  • Exposure toAI, machine learning, automation, or AI security concepts through internship, co-op, academic, or personal projects.

What’sin it for you?

When you join CoStar Group, you’llexperience 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 professionaland 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 planwith matching contributions

  • Employee stock purchase plan

  • Paid time off

  • Tuition reimbursement

  • On-site fitness center and/or reimbursed fitness center membership costs (location dependent)

  • Access to CoStar Group’s Employee Resource Groups

  • Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

The final salary or hourly rate offered for this role will 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: $100,000 - $105,000 annually

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 toprovide visa sponsorship for this position.

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

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
1,952,403 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Security
Similar stack
Same company
Arlington
≈ $86k – $165k per year (Estimated) • Hybrid • 3+ years exp • Bachelor's Degree • United States
DevOps
IAM
Cybersecurity
GDPR
Least Privilege
Active Directory
LDAP
Apply
IT Security Analyst 2 3 hours ago
≈ $78k – $150k per year (Estimated) • Hybrid • Contractor • Richmond
Cybersecurity
PCI DSS
HIPAA
Least Privilege
Apply
IAM Engineer 2 months ago
≈ $70k – $144k per year (Estimated) • In office • Full-Time • 2+ years exp • Bachelor's Degree • United States
DevOps
IAM
Cybersecurity
Active Directory
Apply
IAM Engineer 1 month ago
≈ $70k – $144k per year (Estimated) • In office • Full-Time • 2+ years exp • Bachelor's Degree • United States
DevOps
IAM
Cybersecurity
Active Directory
Apply
≈ $42k – $60k per year (Estimated) • In office • Internship • Smyrna
Cybersecurity
SentinelOne
Apply
≈ $33k – $91k per year (Estimated) • In office • Turkey
Python
SQL
Analytics
Power BI
Apply
≈ $27k – $61k per year (Estimated) • In office • Full-Time • 6+ years exp • Bachelor's Degree • Suzhou
Python
C#
C++
AI/ML
Machine Learning
DevOps
Git
TCP/IP
IoT
OPC UA
Life Sciences
LIMS
Apply
≈ $24k – $49k per year (Estimated) • Hybrid • Full-Time • 4+ years exp • Bachelor's Degree • Bengaluru
Python
Java
SQL
Databases
RabbitMQ
Apache Kafka
DevOps
Rest API
GCP
OpenShift
Azure
CI/CD
Jenkins
AWS
Docker
Kubernetes
Platform Engineering
Incident Management
GitHub
GitLab
API Gateway
Linux
Unix
Management
Agile
Apply
≈ $72k – $165k per year (Estimated) • In office • Freelance • Brussels
Python
JavaScript
Databases
PostgreSQL
MariaDB
DevOps
Incident Management
IAM
Linux
Cybersecurity
Keycloak
LDAP
Apply
In office • Freelance • Brussels
JavaScript
TypeScript
PowerShell
Frontend
React.js
Management
Power Automate
Power Apps
SharePoint
Agile
Apply
$120k – $203k per year • Equity • Hybrid • 4+ years exp • Bachelor's Degree • Arlington • Richmond • Irvine
Python
JavaScript
Databases
OpenSearch
AI/ML
Machine Learning
DevOps
Terraform
Ansible
Cloudflare
Fastly
Akamai
Cybersecurity
ISO 27001
OWASP Top 10
PCI DSS
AWS WAF
OWASP
Apply
$80k – $90k per year • Hybrid • Internship • Bachelor's Degree • Arlington
Python
PowerShell
Bash
AI/ML
Machine Learning
DevOps
Linux
Windows
Apply
$100k – $105k per year • Equity • Hybrid • Bachelor's Degree • Richmond
Python
PowerShell
AI/ML
Machine Learning
Apply
$80k – $90k per year • Hybrid • Internship • Bachelor's Degree • Richmond
Python
PowerShell
Bash
AI/ML
Machine Learning
DevOps
Linux
Windows
Apply
$133k – $203k per year • Equity • Hybrid • 4+ years exp • Bachelor's Degree • Arlington • San Diego
Python
PowerShell
AI/ML
AI Agents
LLM
Agentic Workflows
DevOps
CI/CD
IAM
Windows
Cybersecurity
Okta
BloodHound
Microsoft Defender
Zero Trust
Least Privilege
Microsoft Entra ID
Evilginx2
Rubeus
Certipy
Active Directory
PKI
SIEM
Apply
≈ $109k – $211k per year (Estimated) • In office • TS/SCI • 8+ years exp • Associate's Degree • Arlington
Structured Text
DevOps
TCP/IP
Cybersecurity
Wireshark
Nmap
Shodan
Censys
Zeek
Maltego
VirusTotal
MITRE ATT&CK
Cyber Kill Chain
Diamond Model
SIEM
IoT
OPC UA
Energy
DNP3
Apply
$136k – $184k per year • Equity • In office • Full-Time • 2+ years exp • Bachelor's Degree • Arlington
DevOps
AWS
Cybersecurity
Threat Modeling
Apply
$131k – $237k per year • In office • Full-Time • 10+ years exp • Bachelor's Degree • Arlington
Python
PowerShell
DevOps
Red Hat
OpenShift
Chef
CI/CD
Windows Server
AWS
Linux
Windows
Cybersecurity
Qualys Cloud Platform
Wiz
FedRAMP
SIEM
Apply
JANITOR 1 day ago
≈ $40k – $89k per year (Estimated) • In office • Full-Time • Arlington
Apply
≈ $58k – $109k per year (Estimated) • In office • TS/SCI • Bachelor's Degree • Arlington
Management
Confluence
Agile
Apply
See all jobs
This is one of many
1,952,403 more open roles from verified company boards, updated every day.