{"id":2527979,"url":"https://alion.io/job/costar-lead-detection-and-response-security-engineer","title":"Lead Detection and Response Security Engineer","company":{"id":15350,"name":"CoStar Group","domain":"costar.com","url":"https://alion.io/company/costar","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":true,"listed_via":null,"ats_vendor":"Eightfold","truth_index":{"grade":"B","score":75,"open_postings":6,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-15T05:46:00Z"}},"role":"Security","role_family":"Security","seniority":"lead","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Arlington, United States","San Diego, United States","Richmond, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":91000,"max_usd":188000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":373},"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Active Directory","optional":false},{"name":"CI/CD","optional":false},{"name":"MITRE ATT&CK","optional":false},{"name":"Perl","optional":false},{"name":"PowerShell","optional":false},{"name":"Python","optional":false},{"name":"Windows Server","optional":false}],"status":"live","first_seen_at":"2025-10-17T00:00:00Z","employer_posted_date":"2025-10-17","last_verified_at":"2026-10-15T18:42:53Z","board_verified":true,"closed_at":null,"days_open":363,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":363},"description":"Lead Detection and Response Security EngineerJob Description\nOverview\nCoStar 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.\nWe 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.\nIn 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.\nAs the security section grows, so will the tools and the Lead 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.\nThis position can be located in Arlington or Richmond, VA and is in office Monday through Thursday and work from home on Friday.\nResponsibilities \nIncident handling - serve as the incident response coordinator to oversee all incident response activities and ensure timely and successful resolution of incidents across various business verticals\nDevelop, mature and lead incident response functions and reporting of findings\nLead technical security assessments (network, application, database) for existing and newly acquired businesses or services and collaborate with other teams to adjust security configurations and architecture\nFacilitate quarterly incident response tabletop exercises and updating of the Incident Response Plan\nTeam 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.\nAbility to define and develop platform automations to increase efficiency in responding to observed threats.\nFamiliarity and comfort with at least one scripting language and basic understanding of CI/CD practices.\nCoordinate, performance and derive work from the security review and monitoring of the production environment setup permissions of users, open ports/services and overall network setup\nAbility to examine network, server, and application logs with forensic depth to determine trends and identify security incidents, and train and mentor others to deepen their skills\nUse security tools to audit infrastructure, detect issues and coordinate remediation of any issues\nDevelop and mature threat hunting practices in the CoStar enterprise\nCollaborate with other teams to remediate discovered deficiencies, and develop and improve network and endpoint security configuration procedures\nParticipate in 24x7 on-call rotation\nBasic Qualifications\nBachelor’s Degree required from an accredited, not for profit university or college. \nA track record of commitment to prior employers \nOne or more security certification such as SANS/GIAC, CISSP, CISM, GIAC Certified Incident Handler (GCIH), Certified Expert Incident Handler (CEIH) or equivalent\n8+ years in Information Technology, with 5+ years of cyber security experience.\nScripting/programming skills (Perl, Python, PowerShell)\nExperience with Windows Server 2012/2016 /2019 and Active Directory\nPreferred Qualifications and Skills\nExcellent oral and written communication skills to work effectively with others regardless of departmental or geographic boundaries\nAbility to work on a cultural diverse team that spans international time zones and foster an environment of inclusions and participation with all team members\nExperience with Microsoft Security tooling (Defender, Sentinel, EOP etc.) a plus\nAbility to produce detailed technical documentation\nProficiency with PC software applications, E-Mail, and job associated applications/systems to expediently process work\nRequires good organization skills to produce quality work, within required specifications, and within scheduled timelines\nExcellent customer service skills\nWhat’s in it for You\nWhen 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.\nWe offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement.\nOur benefits package includes (but is not limited to):\nComprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug\nLife, legal, and supplementary insurance\nVirtual and in person mental health counseling services for individuals and family\nCommuter and parking benefits\n401(K) retirement plan with matching contributions\nEmployee stock purchase plan\nPaid time off\nTuition reimbursement\nOn-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes\nAccess to CoStar Group’s Employee Resource Groups\nComplimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks\nWe 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.\nThe 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.\nBase Compensation: 147,000 - 247,000 Annually\nCoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing","description_format":"text","description_chars":6565,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Retirement plans"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Commerce","Real Estate","Commercial Real Estate"],"lifecycle":[{"event":"open","at":"2026-10-14T12:24:44Z"}],"visa":[],"liveness":{"score":7,"band":"cold","label":"Long shot","p_open":1,"p_active":0.261,"p_room":0.28,"age_days":363,"expected_fill_days":29,"reasons":["conf:2","win:tail","crowd:brand"],"computed_at":"2026-10-15T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/costar-lead-detection-and-response-security-engineer","json_url":"https://alion.io/job/costar-lead-detection-and-response-security-engineer.json","meta":{"generated_at":"2026-10-15T21:48:07Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":33057,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":15350},"rest":"https://alion.io/mcp/rest/get_company?id=15350"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcostar-lead-detection-and-response-security-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcostar-lead-detection-and-response-security-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcostar-lead-detection-and-response-security-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/costar-lead-detection-and-response-security-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcostar-lead-detection-and-response-security-engineer"}]}