{"schemaVersion":"jobsearcher.job.v1","id":"555a1fbb8cc06f0d5a1f3e50","url":"https://jobsearcher.com/jobs/555a1fbb8cc06f0d5a1f3e50","canonicalUrl":"https://jobsearcher.com/jobs/555a1fbb8cc06f0d5a1f3e50","title":"Platform Engineer - Security Focus","description":"Job Title: Platform Engineer – Security Focus\r\nJob Location: Remote – United States\r\nCompensation: $70,000 - $85,000 base salary, benefits, PTO, etc.\r\nEligibility/Clearance: US Citizenship required, this position supports a government contract and requires a background investigation.\r\nJob Description We are seeking a senior-level Platform Engineer with a strong background in managed services and security operations to support multi-tenant client environments. This role blends infrastructure engineering (approximately 75%) with hands-on security operations (approximately 25%). The Platform Engineer will be responsible for maintaining, troubleshooting, and optimizing Windows Server, Microsoft 365, Azure, and line-of-business systems while also supporting security incident response, email threat analysis, endpoint protection, and identity security. This position requires a professional who can operate confidently in production environments, manage client communications, and make sound technical decisions under pressure.\r\nResponsibilities (include but are not limited to) Infrastructure & Application Support Serve as the escalation point for complex infrastructure and application issues across multi-tenant environments.\r\nTriage and optimize monitoring and alerting systems to reduce noise and prevent incidents.\r\nDiagnose and restore line-of-business applications, including payroll, HR, accounting, and public safety systems.\r\nManage Windows Server environments including services, storage, permissions, and diagnostics.\r\nPerform SQL Server operator-level administration and health checks.\r\nManage endpoints, virtual desktop environments, and mobile device management policies.\r\nLead change management processes including patching, deployments, and validation.\r\nMaintain accurate ticketing and coordinate high-priority incidents and vendor escalations.\r\nMicrosoft 365 & Identity Administer Microsoft 365 and Exchange Online environments.\r\nManage identity lifecycle across Active Directory and Entra ID.\r\nConfigure and troubleshoot email authentication protocols (SPF, DKIM, DMARC) and DNS records.\r\nAdminister firewall and VPN solutions, including FortiGate systems.\r\nSecurity Operations Triage and investigate phishing emails and user-reported threats.\r\nAnalyze DMARC reports and recommend policy improvements.\r\nConfigure and maintain Microsoft Defender for Office 365 protections.\r\nAdminister application control tools such as ThreatLocker.\r\nPerform identity security tasks including MFA resets and session revocation.\r\nCoordinate with MDR/SOC providers to respond to alerts and incidents.\r\nInvestigate suspicious sign-ins and audit logs within Entra ID.\r\nExecute rapid response actions such as IP or domain blocking during threats.\r\nRequirements 5+ years of experience in a Managed Service Provider (MSP) environment in a senior or Level 3 role.\r\nStrong expertise in Windows Server administration, including Group Policy and Hyper-V.\r\nProven experience with Microsoft 365 and Exchange Online administration.\r\nProficiency in Active Directory and Entra ID identity management.\r\nExperience with email authentication protocols (SPF, DKIM, DMARC).\r\nFirewall and VPN administration experience (FortiGate preferred).\r\nExperience with RMM tools such as Datto RMM or NinjaOne.\r\nHands-on experience with phishing triage and security incident response.\r\nFamiliarity with endpoint application control platforms such as ThreatLocker.\r\nExperience working with MDR/SOC providers.\r\nSQL Server operator-level knowledge.\r\nPowerShell scripting experience.\r\nDemonstrated ability to manage multiple environments under change control.\r\nStrong communication skills for technical and non-technical audiences.\r\nDesired Qualifications Experience with Microsoft Defender for Endpoint (MDE).\r\nFamiliarity with SIEM platforms such as Todyl, Adlumin, or Azure Log Analytics.\r\nExperience with Azure infrastructure including VMs, AVD, and networking.\r\nExperience supporting payroll, HR, or financial applications.\r\nFamiliarity with vulnerability management tools such as Tenable.io.\r\nExperience administering security awareness platforms.\r\nKnowledge of compliance frameworks such as CIS and SOC 2.\r\nFamiliarity with Microsoft 365 Government (GCC High).\r\nRelevant Microsoft security certifications (SC-900, MS-500, AZ-500).\r\nEducation Bachelors Degree\r\nEqual Opportunity Employer ATR is an Equal Opportunity Employer (EOE) who will provide equal employment opportunity to employees and applicants for employment without regard to race, ethnicity, religion, color, sex, pregnancy, national origin, age, veteran status, ancestry, sexual orientation, gender identity or expression, marital status, family structure, genetic information, or mental or physical disability.\r\nJ-18808-Ljbffr","company":"Arena Technical Resources","rawCompany":"arena technical resources","city":"Springfield","state":"VA","isRemote":false,"isActive":true,"createdAt":"2026-06-25T01:16:31.156Z","occupations":[{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1244.00","title":"Network and Computer Systems Administrators","slug":"network-and-computer-systems-administrators"},{"code":"15-1299.05","title":"Information Security Engineers","slug":"information-security-engineers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541519","title":"Other Computer Related Services","slug":"other-computer-related-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Platform Engineer - Security Focus","description":"Job Title: Platform Engineer – Security Focus\r\nJob Location: Remote – United States\r\nCompensation: $70,000 - $85,000 base salary, benefits, PTO, etc.\r\nEligibility/Clearance: US Citizenship required, this position supports a government contract and requires a background investigation.\r\nJob Description We are seeking a senior-level Platform Engineer with a strong background in managed services and security operations to support multi-tenant client environments. This role blends infrastructure engineering (approximately 75%) with hands-on security operations (approximately 25%). The Platform Engineer will be responsible for maintaining, troubleshooting, and optimizing Windows Server, Microsoft 365, Azure, and line-of-business systems while also supporting security incident response, email threat analysis, endpoint protection, and identity security. This position requires a professional who can operate confidently in production environments, manage client communications, and make sound technical decisions under pressure.\r\nResponsibilities (include but are not limited to) Infrastructure & Application Support Serve as the escalation point for complex infrastructure and application issues across multi-tenant environments.\r\nTriage and optimize monitoring and alerting systems to reduce noise and prevent incidents.\r\nDiagnose and restore line-of-business applications, including payroll, HR, accounting, and public safety systems.\r\nManage Windows Server environments including services, storage, permissions, and diagnostics.\r\nPerform SQL Server operator-level administration and health checks.\r\nManage endpoints, virtual desktop environments, and mobile device management policies.\r\nLead change management processes including patching, deployments, and validation.\r\nMaintain accurate ticketing and coordinate high-priority incidents and vendor escalations.\r\nMicrosoft 365 & Identity Administer Microsoft 365 and Exchange Online environments.\r\nManage identity lifecycle across Active Directory and Entra ID.\r\nConfigure and troubleshoot email authentication protocols (SPF, DKIM, DMARC) and DNS records.\r\nAdminister firewall and VPN solutions, including FortiGate systems.\r\nSecurity Operations Triage and investigate phishing emails and user-reported threats.\r\nAnalyze DMARC reports and recommend policy improvements.\r\nConfigure and maintain Microsoft Defender for Office 365 protections.\r\nAdminister application control tools such as ThreatLocker.\r\nPerform identity security tasks including MFA resets and session revocation.\r\nCoordinate with MDR/SOC providers to respond to alerts and incidents.\r\nInvestigate suspicious sign-ins and audit logs within Entra ID.\r\nExecute rapid response actions such as IP or domain blocking during threats.\r\nRequirements 5+ years of experience in a Managed Service Provider (MSP) environment in a senior or Level 3 role.\r\nStrong expertise in Windows Server administration, including Group Policy and Hyper-V.\r\nProven experience with Microsoft 365 and Exchange Online administration.\r\nProficiency in Active Directory and Entra ID identity management.\r\nExperience with email authentication protocols (SPF, DKIM, DMARC).\r\nFirewall and VPN administration experience (FortiGate preferred).\r\nExperience with RMM tools such as Datto RMM or NinjaOne.\r\nHands-on experience with phishing triage and security incident response.\r\nFamiliarity with endpoint application control platforms such as ThreatLocker.\r\nExperience working with MDR/SOC providers.\r\nSQL Server operator-level knowledge.\r\nPowerShell scripting experience.\r\nDemonstrated ability to manage multiple environments under change control.\r\nStrong communication skills for technical and non-technical audiences.\r\nDesired Qualifications Experience with Microsoft Defender for Endpoint (MDE).\r\nFamiliarity with SIEM platforms such as Todyl, Adlumin, or Azure Log Analytics.\r\nExperience with Azure infrastructure including VMs, AVD, and networking.\r\nExperience supporting payroll, HR, or financial applications.\r\nFamiliarity with vulnerability management tools such as Tenable.io.\r\nExperience administering security awareness platforms.\r\nKnowledge of compliance frameworks such as CIS and SOC 2.\r\nFamiliarity with Microsoft 365 Government (GCC High).\r\nRelevant Microsoft security certifications (SC-900, MS-500, AZ-500).\r\nEducation Bachelors Degree\r\nEqual Opportunity Employer ATR is an Equal Opportunity Employer (EOE) who will provide equal employment opportunity to employees and applicants for employment without regard to race, ethnicity, religion, color, sex, pregnancy, national origin, age, veteran status, ancestry, sexual orientation, gender identity or expression, marital status, family structure, genetic information, or mental or physical disability.\r\nJ-18808-Ljbffr","datePosted":"2026-06-25T01:16:31.156Z","dateModified":"2026-06-25T01:16:31.156Z","hiringOrganization":{"@type":"Organization","name":"Arena Technical Resources","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Springfield","addressRegion":"VA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"555a1fbb8cc06f0d5a1f3e50"},"url":"https://jobsearcher.com/jobs/555a1fbb8cc06f0d5a1f3e50"}}