Messaging & Collaboration Team Lead

sagl consulting pte. ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Sagl Consulting Pte. Ltd.

in Singapore seeks a highly technical Messaging & Collaboration Team Lead to architect, manage, and optimize our enterprise communications infrastructure, serving as the definitive L4 technical authority for L2 and L3 engineering teams in a massive, high-volume environment (100,000+ users). You will define technical strategy, oversee architecture, and drive platform management for Microsoft Exchange, SharePoint, Teams, and Azure AD, while building automation with

Qualifications

• 10+ years of dedicated experience in enterprise messaging/collaboration engineering.
• 2+ years in a technical leadership or delivery role, mentoring L2/L3 teams.

Responsibilities

• Architect, manage, and optimize Microsoft 365 messaging and collaboration environments.
• Lead architecture reviews focusing on security, cost, and scalability.
• Provide L4 escalation support and drive root-cause analysis for incidents.
• Develop runbooks and upskill L2/L3 teams.

Skills

Microsoft 365

PowerShell

Microsoft Graph API

L4 escalation

Tools

Exchange Server

SharePoint

Teams

Azure AD Entra ID

Job description

Role Summary

We are seeking a highly technical Messaging & Collaboration Team Lead to architect, manage, and optimize our enterprise communications infrastructure. You will define technical strategy, manage architecture, and serve as the definitive L4 technical authority for L2 and L3 engineering teams in a massive, high-volume environment (100,000+ users).

Core Responsibilities

Architecture & Platform Management

• Architect, support, and optimize Microsoft Exchange (On-Premises, Online, Hybrid), SharePoint (On-Premises, Online), and Microsoft Teams.

• Manage Azure AD (Entra ID) synchronizations, conditional access policies, and enterprise Role-Based Access Control (RBAC).

• Maintain robust mail transport rules, highly available SMTP routing, and enterprise Data Loss Prevention (DLP) policies.

• Lead architectural reviews to ensure security, cost efficiency, and scalability across messaging and collaboration environments.

Automation & Engineering

• Write, review, and optimize advanced custom PowerShell modules.

• Utilize the Microsoft Graph API for large-scale data processing and administrative automation.

Technical Leadership & Operations

• Serve as the L4 escalation point for complex, high-severity incidents, conducting root-cause analysis for issues L2/L3 teams cannot resolve.

• Oversee daily operations, including shift rosters, patching schedules, and incident escalation paths.

• Develop technical documentation, runbooks, and KB articles to upskill and empower L2/L3 support teams.

Essential Technical Skills

• Core Stack: Subject Matter Expert (SME) in Microsoft 365, Exchange (SE/Online), SharePoint, SharePoint Online, and Microsoft Teams.

• Identity & Security: Deep operational knowledge of Azure AD (Entra ID), Azure AD Connect, and enterprise directory services.

• Scripting: Advanced proficiency in PowerShell and Microsoft Graph API.

• Scale: Proven experience architecting and migrating systems in massive, complex enterprise environments.

Required Qualifications

• Experience: 10+ years of dedicated experience in enterprise messaging/collaboration engineering.

• Leadership: 2+ years in a technical leadership or delivery role, with demonstrated experience structurally supporting and mentoring L2/L3 operations.