Senior Network Security Engineer

Senior Network Security Engineer Job Description 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 are looking for a Senior Network Security Engineer to improve our information security posture at CoStar Group. The scope of responsibility spans an 85 office WAN (including SD-WAN, Wi-Fi, route, switch, and firewall), highly scaled physical colocation data centers with route, switch, firewall, LTM, GTM), multi-cloud networking (VPCs, VNets, CDN, GTM, AWS TG, ANF, K8s networking, mesh service networking) and zero trust privileged network access. You will communicate and reinforce security concepts to technical and non-technical audiences across the CoStar Enterprise. The ideal candidate possesses several years of hands-on senior level experience in either office WAN/LAN security OR (data center AND cloud networking environments) in large software environments. Successful candidates will be self-starters motivated to learn new technologies and tools and assist in moving security forward as it is implemented within the CoStar Enterprise. This position is located in Arlington, VA or Richmond, VA and is onsite Monday – Thursday, with an option to work from home on Friday. Responsibilities Audit existing network designs and configurations and champion improvements Evaluate firewall change requests – both on-premise and cloud Design, enforce, and audit policy for various blades of a Next Generation Firewall (NGFW), load balancers, routers, switches, Wi-Fi controllers, etc. Tune and update Intrusion Prevention Systems (IPS) Use security tools to test and detect vulnerability issues and coordinate remediation Perform security review and ensure proper monitoring/logging - including permissions of users, open ports/services, and overall network setup Collaborate with threat management on detection engineering of network telemetry Conduct threat hunting in the CoStar enterprise Participate in 24x7 on-call rotation Follow, develop, and improve network and security configuration policies, standards, and procedures Assist with the move towards a zero-trust methodology Strengthen AWS network security posture on east/west and north/south traffic. Lead the creation of a secure and automated certificate management solution Uplift network protocols and cipher suites across the enterprise Uplift DNS security including Email DNS security (DMARC, SPF) Basic Qualifications Bachelor’s Degree required from an accredited, not for profit university or college. A track record of commitment to prior employers 4 Total years of experience across network engineering and/or cybersecurity, with a minimum of at least 2 years of experience in each. Proficient in a scripting or programming language (Terraform, Python, Perl, PowerShell, Ansible, Cloud Formation, etc.) At least one certification in either security or networking such as SANS/GIAC, CISSP, CCNA, CCNP, etc. 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, tuition reimbursement, and an inter-office exchange program. 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 CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing.

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