Expert IT Infrastructure Engineer

Overview

Ciklum is looking for a Expert IT Infrastructure Engineer to join our team full-time in India.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

We are seeking a highly experienced Expert IT Infrastructure Engineer with deep expertise across Microsoft 365, Exchange, Identity, and Azure infrastructure to lead, operate, and continuously evolve our enterprise collaboration, messaging, and cloud platforms. This role is responsible for the end-to-end reliability, security, and scalability of Microsoft 365, Exchange, Active Directory, Entra ID, and Azure services supporting corporate offices, branch locations, and field teams.

Responsibilities:

• Lead day-to-day operations of Microsoft Exchange and Microsoft 365 across on-premises, hybrid, and cloud environments, ensuring high availability, performance, security, and SLA adherence for enterprise messaging and collaboration services
• Plan and execute Exchange and identity migrations for mergers, acquisitions, and divestitures, including tenant-to-tenant migrations, mailbox and domain coexistence, identity consolidation, and cutover strategies with minimal business disruption
• Administer and continuously optimize the Microsoft 365 tenant, including licensing, security and compliance policies, Microsoft Defender for Office 365 (EOP/MDO), Intune, and service integrations across collaboration workloads
• Manage and secure enterprise identity platforms, including On-Premises Active Directory and Entra ID, covering OU design, Group Policy, delegated administration, RBAC, authentication models, and hybrid identity (AAD Connect / Cloud Sync)
• Design, deploy, upgrade, and operate Exchange environments, including version upgrades and migrations to Exchange Online, ensuring resiliency, compliance, and operational excellence
• Own Windows Server administration across on-premises and Azure-hosted environments, including patching, hardening, performance tuning, backup/restore, monitoring, capacity planning, and compliance with enterprise standards
• Lead Azure infrastructure operations, managing Virtual Machines, Storage Accounts, Virtual Networks, and platform services to ensure availability, scalability, security, and cost efficiency
• Drive on-premises to Azure migration initiatives, ensuring secure data transfer, workload modernization, governance alignment, and minimal impact to business operations
• Architect, deploy, and operate container platforms using Azure App Services and cloud-native workloads & Azure Kubernetes Service (AKS) to ensure high availability, performance, and secure application hosting
• Implement and maintain robust email security and compliance controls, including protection against phishing, malware, spoofing, and spam, as well as retention, legal hold, eDiscovery, AIP, and DLP
• Troubleshoot and resolve complex Exchange, identity, and Windows infrastructure incidents (L2/L3), lead root-cause analysis, and implement long-term preventive and reliability improvements
• Develop and maintain backup, disaster recovery, and business continuity strategies for messaging, identity, and Windows-based infrastructure services
• Drive automation and standardization using PowerShell and related tool chains to improve provisioning, configuration management, reporting, and operational efficiency
• Produce and maintain high-quality documentation, including runbooks, operational procedures, architecture diagrams, and change records in alignment with change management practices
• Collaborate with cross-functional teams, including Service Desk, SCCM/Platform teams, Security, and Account Management, to ensure seamless operations, secure deployments, and effective support handoffs
• Participate in agile delivery and operational governance, including stand-ups, retrospectives, backlog refinement, and regular status reporting
• Provide secondary support for DNS and Print Server services, ensuring reliable name resolution and printing for corporate offices and on-site teams
• Participate in on-call rotations and scheduled maintenance windows, supporting critical incidents, infrastructure upgrades, and strategic technology initiatives

Requirements:

• Bachelor’s degree in IT, Computer Science, or related field; or equivalent work experience
• 7–10 years of hands-on IT engineering with deep Exchange experience (2013/2016/2019 and Exchange Online)
• 7+ years supporting Exchange Online and Microsoft 365 in enterprise environments
• 5+ years in similar roles covering AD design, Azure/Entra and O365 break/fix, engineering, complex implementations, and migrations
• Expertise in Exchange administration, hybrid configurations, mail flow/SMTP relay, and transport/security policies
• Hands-on experience with complex AD infrastructures; strict adherence to standards, procedures, and processes
• Proficiency with email migration tools and methodologies; experience with backup and recovery for messaging systems
• Strong experience with O365 Security & Compliance: Litigation Hold, eDiscovery, AIP, and DLP deployment
• Operational knowledge of hygiene solutions: EOP/Defender for Office 365 (ATP), IronPort, FireEye ETP-C, Proofpoint
• PowerShell scripting and command-line proficiency across Exchange, M365, AD/Entra, and Windows Server
• Excellent troubleshooting, analytical, communication, and documentation skills; effective collaborator and team member
• Skill Summury:
• Core Infrastructure: Microsoft Exchange (On-Prem, Online, Hybrid), Microsoft 365, Active Directory / Entra ID, Windows Server, Linux, Hyper-V
• Cloud & Azure: Azure Virtual Machines, Storage Accounts, Virtual Networks, Azure Resource Manager, Azure CLI, Azure RBAC, Azure Policy, Azure Monitor, Azure Bastion, Azure Traffic Manager
• Messaging & Security: Intune, Microsoft Defender for Office 365, eDiscovery, AIP, DLP, mail hygiene solutions
• Backup & DR: Egnyte Backup, Rubrik Backup, Azure Backup, snapshots and restore testing
• Automation & DevOps: PowerShell, Azure CLI, Terraform, YAML, CI/CD, KQL
• Collaboration: Teams, Stream, Planner, Power Platform, Power Automate
• Networking: VPNs, Load Balancers, Failover Clusters, DNS (Infoblox), Print Servers

Desirable:

• Experience with Intune device/app management, Conditional Access, and configuration baselines
• Experience with SCCM/ConfigMgr-based deployments and client management
• Hands-on DNS administration (zones, records, split-brain, security) and Print Server management (queues, drivers, GPO deployment)
• Familiarity with ITIL practices, change/incident/problem management workflows
• Relevant certifications: Microsoft 365 Certified (Administrator Expert, MS-102), Microsoft Certified: Identity and Access Administrator (SC-300), Exchange-focused certifications, CompTIA Security+, AZ-104 or equivalent

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

India is a strategic innovation hub for Ciklum, with growing teams in Chennai and Pune leading advancements in EdgeTech, AR/VR, IoT, and beyond. Join us to collaborate on game-changing solutions and take your career to the next level.

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Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.