{"id":4007509,"url":"https://alion.io/job/weekday-senior-system-administrator","title":"Senior System Administrator","company":{"id":7097,"name":"Weekday","domain":"weekday.works","url":"https://alion.io/company/weekday","size_band":"51-200","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"B","score":80,"open_postings":105,"ghost_share":0,"stale_share":0.981,"repost_share":0,"time_to_fill_p50_days":5,"computed_at":"2026-11-10T06:52:35Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Active Directory","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"DHCP","optional":false},{"name":"DLP","optional":false},{"name":"DNS","optional":false},{"name":"GCP","optional":false},{"name":"Hyper-V","optional":false},{"name":"Microsoft Defender","optional":false},{"name":"Microsoft Entra ID","optional":false},{"name":"MPLS","optional":false},{"name":"OneDrive","optional":false},{"name":"PKI","optional":false},{"name":"PowerShell","optional":false},{"name":"SharePoint","optional":false},{"name":"Sophos","optional":false},{"name":"TCP/IP","optional":false},{"name":"VLAN","optional":false},{"name":"VMWare","optional":false},{"name":"VPN","optional":false},{"name":"Windows","optional":false},{"name":"Windows Server","optional":false}],"status":"live","first_seen_at":"2026-11-10T08:02:53Z","employer_posted_date":"2026-11-10","last_verified_at":"2026-11-10T08:02:53Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"This role is for one of Weekday’s clients\nMin Experience: 5+ years\nLocation: Bengaluru\nJobType: full-time\nWe are looking for an experienced Senior System Administrator to manage and maintain enterprise IT infrastructure, Microsoft 365 environments, endpoint security, cloud platforms, networking, storage, backup, and disaster recovery operations.\nThe ideal candidate will have strong expertise in Windows Server administration, Active Directory, and Microsoft 365, along with the ability to independently manage business-critical IT environments across on-premises, cloud, and hybrid infrastructures. The role requires a strong focus on infrastructure security, availability, scalability, redundancy, compliance, and operational excellence.\nRequirements\nKey Responsibilities\nEnterprise Infrastructure and Systems Administration\nManage enterprise IT infrastructure, including Windows Server 2012, 2016, 2019, and 2022 environments.\nAdminister Active Directory, Forest and Domain Management, DNS, DHCP, DFS, Group Policy, WSUS, PKI, IAS/NPS, and File and Print Services.\nPerform server administration, operating system management, patching, migrations, cloning, capacity planning, health checks, and lifecycle management.\nManage VMware vSphere and Microsoft Hyper-V environments, including VM provisioning, migration, cloning, snapshots, HA clusters, and resource optimisation.\nMicrosoft 365 and Identity Management\nAdminister Microsoft 365 services, including Exchange Online, Intune, Entra ID, Defender, Purview, Teams, SharePoint Online, OneDrive, and Windows Autopilot.\nManage user administration, access controls, licensing, Role-Based Access Control (RBAC), Multi-Factor Authentication (MFA), Conditional Access, Single Sign-On (SSO), and identity governance.\nManage Windows, macOS, Android, and iOS devices using Microsoft Intune, JAMF Pro, Apple Business Manager, and Mobile Device Management/Application Management (MDM/MAM).\nEndpoint Security and Cybersecurity\nManage endpoint security, device compliance, device and application control, BitLocker encryption, EDR, XDR, antivirus, threat protection, and security baselines.\nImplement and maintain security solutions such as Microsoft Defender for Endpoint, Sophos Endpoint Security, McAfee ePO, email security gateways, and Data Loss Prevention (DLP).\nPerform vulnerability management, endpoint hardening, attack surface reduction, security assessments, and VAPT remediation.\nManage Sophos firewalls, security policies, SSL VPN, IPSec VPN, Site-to-Site VPN, intrusion prevention and detection systems, NAT rules, application control, and web filtering.\nNetwork Administration\nDesign, implement, and support enterprise LAN, WAN, WLAN, MPLS, and SD-WAN infrastructure.\nManage routing, switching, TCP/IP, VLANs, NAT, wireless networks, and network segmentation.\nConfigure and maintain Layer 2 and Layer 3 networking, including STP, RSTP, VTP, EtherChannel, Inter-VLAN Routing, and routing protocols.\nManage routers, switches, access points, firewalls, and network security appliances.\nEnsure network availability, high availability, redundancy, and secure connectivity.\nCloud, Storage, Backup and Disaster Recovery\nManage Azure, AWS, and GCP environments, including compute, networking, storage, identity, governance, and cloud security.\nAdminister NAS, SAN, RAID, storage replication, cloud storage, and capacity planning.\nManage full, incremental, differential, image-level, VM-level, and cloud backups.\nImplement and maintain Disaster Recovery (DR) and Business Continuity Planning (BCP) processes.\nEnsure infrastructure redundancy, failover mechanisms, high availability, and operational resilience.\nMonitoring, Maintenance and Compliance\nMonitor infrastructure using PRTG, ManageEngine OpManager, Action1, Altris Patch Management, McAfee ePO, Azure Monitor, and security monitoring platforms.\nPerform preventive maintenance, root cause analysis, patch compliance checks, firmware upgrades, and security updates.\nConfigure and support FTP, SFTP, FTPS, SSL certificates, SPF, DKIM, and DMARC.\nSupport internal and external audits, security assessments, risk assessments, audit documentation, SOPs, and remediation plans.\nManage vendors, OEMs, ISPs, software licensing, renewals, procurement coordination, budget planning, cost optimisation, and SLA governance.\nRequired Technical Skills\nInfrastructure and Systems: Windows Server, Wintel, Active Directory, Forest and Domain Management, DNS, DHCP, DFS, WSUS, PKI, IAS/NPS, File and Print Services.\nMicrosoft Technologies: Microsoft 365, Exchange Online, Intune, Entra ID, Microsoft Defender Suite, Purview, SharePoint Online, Teams, OneDrive, Windows Autopilot, PowerShell.\nEndpoint Security: Microsoft Defender for Endpoint, EDR, XDR, Endpoint Compliance, Device Control, ASR Rules, BitLocker, Endpoint Hardening, Application Control, Vulnerability Management, Sophos Endpoint Security, McAfee ePO.\nNetworking: TCP/IP, Routing and Switching, VLANs, VTP, STP, RSTP, EtherChannel, MPLS, SD-WAN, NAT, Wireless Networks, Routing Protocols.\nFirewall and VPN: Sophos Firewall, SSL VPN, IPSec VPN, Site-to-Site VPN, IPS, IDS, Web Filtering, Application Control.\nCloud Platforms: Microsoft Azure, AWS, GCP.\nStorage and Backup: NAS, SAN, RAID, Backup and Recovery, Disaster Recovery, Business Continuity Planning.\nVirtualisation: VMware vSphere, Microsoft Hyper-V.\nMonitoring and Patch Management: PRTG, ManageEngine OpManager, Action1, Altris, McAfee ePO, Azure Monitor.\nSecurity and Compliance: DLP, Email Security Gateways, VAPT, Security Hardening, Vulnerability Assessment, Risk Management, Audit Support.\nMust-Have Skills\nWindows Server\nActive Directory\nMicrosoft 365\nGood-to-Have Skills\nCloud Platforms\nApple Device Management\nAdvanced Networking","description_format":"text","description_chars":5754,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Endpoint Security"],"lifecycle":[{"event":"open","at":"2026-11-10T08:02:53Z"}],"visa":[],"liveness":{"score":52,"band":"ok","label":"Likely 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