Exchange Server, Hybrid & Microsoft 365 Customer Engineer

Sonata Software; Singapore; Hybrid; SGD 120,000 - 190,000; Full time

Job summary

Sonata Software is seeking a senior Customer Engineer (L400) with expert-level Exchange Server and Hybrid/Microsoft 365 skills to design, deploy, migrate, optimize and troubleshoot complex messaging environments for enterprise and government customers.

The role requires 10+ years in customer-facing roles, strong communication, and the ability to lead end-to-end migrations and hybrid deployments from legacy systems to Exchange Online.

Qualifications

• 10+ years in customer-facing roles across systems architecture, administration, operations, IT consulting, and on-premises and cloud support for enterprise and/or government customers.
• BA/BS (or higher) in Information Technology or a related field, or equivalent experience.
• Strong communication, presentation and interpersonal skills.

Responsibilities

• Lead architecture, design, deployment and optimization of on-premises, hybrid and Exchange environments.
• Plan and execute upgrades and migrations across Exchange versions (2010, 2013, 2016, 2019 and Exchange Server Subscription Edition) and to Exchange Online.
• Configure and operate Exchange Hybrid, including the Hybrid Configuration Wizard, Modern Hybrid and Classic Hybrid deployments.
• Design high availability and disaster recovery using DAGs, load balancing, namespaces and certificates.
• Deliver health checks, risk assessments, workshops and knowledge transfer to customer teams.

Skills

Customer-facing

Systems architecture

Administration

IT consulting

Microsoft Exchange

Education

BA/BS in Information Technology or related field

Tools

Microsoft Graph API

Microsoft Teams

SharePoint Online

Job description

Sonata Software, with over $1.2 Billion Revenue, is a leading AI-first Modernization Engineering company, powered by our unique PlatformationTM framework. Our 6400+ AI Engineers are helping enterprises transform from systems to intelligent business platforms leveraging partner ecosystem to drive speed, efficiency and growth. Our bouquet of Modernization Engineering Services with AI -first approach cuts across Cloud, Data, AI, Dynamics, Test Automation, and Managed Services.

Sonata’s AI-led modernization is enabled by a powerful suite of proprietary tools and assets. At the core is the Harmoni.AI Enterprise Platform, which includes Agent Bridge-a governance and observability framework; Agent Builder-a development toolkit for fungible agents integrated into enterprise systems; and the Agent Marketplace-an internal ecosystem for modular, reusable agents.

Headquartered in Bengaluru, India, Sonata Software has a strong global presence, including key regions US, UK, India, Malaysia, Mexico, Australia, DACH (Germany/Switzerland) & Nordics (Finland). We are a trusted partner of Fortune 500 companies in Banking, Financial Services and Insurance; Healthcare and Lifesciences; Telecom, Media, and Technology; and Retail, Manufacturing and Distribution space.

Deep collaborations with partners like Microsoft, AWS, Salesforce, and Snowflake strengthen our ability to deliver cutting-edge AI solutions. Our 30+years of partnership with Microsoft, and being part of the elite Microsoft Inner Circle, places us among the top 1% of global Microsoft partners. Sonata is now among the first companies to earn the Microsoft Frontier Partner Badge Also; Sonata Software is proud to achieve AWS Premier Tier Status in the AWS Partner Network.

CSA GD Exchange Server, Hybrid & Microsoft 365 Customer Engineer

Job Description | CSA GD POD | Level 400

Shifts Must be willing to work in shifts

Travel Must be willing to travel within the country

Role Overview

We are seeking a highly experienced, customer-facing Customer Engineer with expert-level

(L400) skills across all versions of Exchange Server, Exchange Hybrid and Microsoft 365.

The candidate will design, deploy, migrate, optimize and troubleshoot complex messaging

environments for enterprise and government customers, from legacy Exchange through to

Exchange Online, and act as a trusted technical advisor to technical, non-technical and

leadership stakeholders.

Key Responsibilities

• Lead architecture, design, deployment and optimization of on-premises, hybrid and
• Plan and execute upgrades and migrations across Exchange versions (2010, 2013, 2016, 2019 and Exchange Server Subscription Edition) and to Exchange Online.
• Configure and operate Exchange Hybrid, including the Hybrid Configuration Wizard, Modern/Classic Hybrid, free/busy, mail flow and coexistence.
• Design high availability and disaster recovery using DAGs, load balancing, namespaces and certificates.
• Resolve complex, critical-severity issues with root-cause analysis and clear remediation plans.
• Deliver health checks, risk assessments, workshops and knowledge transfer to customer teams.
• Secure messaging environments and advise on compliance, retention and Microsoft 365 governance.
• Automate administration and reporting with PowerShell and Microsoft Graph.
• Produce design documents, runbooks, migration plans and executive summaries.

Required Technical Skills (L400)

Exchange Server (all versions)

• Deep knowledge of Exchange Server 2010, 2013, 2016, 2019 and Subscription Edition architecture, roles and services.
• Installation, cumulative/security updates, upgrades, side-by-side migrations and decommissioning (including removing the last Exchange server where supported).
• Database Availability Groups, transport (Edge/Mailbox), client access, namespace planning and certificate management.
• Performance tuning, capacity planning and advanced troubleshooting with logs, message tracking and diagnostic tools.

Exchange Hybrid

• Hybrid Configuration Wizard, Modern Hybrid Agent and Classic Hybrid deployments.
• Mailbox moves (remote move migrations), migration batches and endpoints; cutover, staged and IMAP migrations.
• Hybrid mail flow, connectors, centralized mail transport, OAuth, free/busy and organization relationships.
• Identity synchronization with Microsoft Entra Connect / Cloud Sync and Active Directory.

Microsoft 365 / Exchange Online

• Exchange Online administration: mailboxes, shared/resource mailboxes, permissions, policies, mail flow rules and connectors. DKIM and DMARC.
• Microsoft Purview: retention, litigation hold, eDiscovery, data loss prevention and auditing.
• Microsoft Entra ID: Conditional Access, MFA and modern authentication.
• Microsoft 365 tenant administration, service health, usage reporting and adoption.
• Cross-tenant mailbox migrations and tenant-to-tenant scenarios.

Experience and Qualifications

• 10+ years in customer-facing roles across systems architecture, administration, operations, IT consulting, and on-premises and cloud support for enterprise and/or government customers.
• Proven track record delivering large Exchange migrations and hybrid deployments end to end.
• BA/BS (or higher) in Information Technology or a related field, or equivalent experience.
• Strong communication, presentation and interpersonal skills.

Optional Skills

• Microsoft Graph API and Exchange Online PowerShell automation.
• Microsoft Teams and SharePoint Online integration with Exchange.
• Well-Architected Framework and Cloud Adoption Framework concepts.

Administrator Expert, or Microsoft 365 Certified: Enterprise Administrator Expert

(MS-102) are a plus

Why join Sonata Software?

At Sonata, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build never seen before solutions to some of the world’s toughest problems. You´ll be challenged, but you will not be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

Sonata Software is an Equal Opportunity Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity, age, religion, disability, sexual orientation, veteran status, marital status, or any other characteristics protected by law.