Senior Engineer (Microsoft 365 Exchange Online) at NCS Australia

Singapore, , Singapore -

Full Time

Start Date

Immediate

Expiry Date

14 Oct, 26

Salary

0.0

Posted On

16 Jul, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Microsoft 365 Exchange Online, Mail Flow Management, Email Security, PowerShell, Active Directory, Root Cause Analysis, ITIL, Capacity Planning, SPF/DKIM/DMARC, Disaster Recovery, Incident Management, System Patching

Industry

IT Services and IT Consulting

Description

Job Description Role Overview: Ensure the continuous availability, security, and optimal performance of enterprise email and messaging platforms, enabling seamless business communication and collaboration across the organization. Key Responsibilities: Monitor messaging infrastructure health, perform proactive health checks, and review performance metrics to ensure high availability. Manage enterprise mailboxes, including provisioning, permissions, quota management, and resolving escalated user issues. Execute system maintenance activities such as patching, updates, backup management, capacity planning, and platform upgrades. Configure and manage email security solutions, including anti-spam, anti-malware, phishing protection, DLP, encryption, and email authentication (SPF, DKIM, DMARC). Configure, manage, and troubleshoot mail flow rules, transport rules, connectors, routing policies, and optimize mail flow to ensure efficient message delivery. Provide Level 2/3 support for escalated incidents, conduct root cause analysis (RCA), and implement permanent fixes to prevent recurrence. Monitor and optimize system performance, capacity, and resource utilization; analyze metrics and implement tuning strategies. Develop and maintain automation scripts using PowerShell, Shell, Bash, or Python to streamline routine administrative tasks and improve operational efficiency. Plan and execute platform upgrades, migrations, and maintenance activities with minimal disruption; participate in disaster recovery planning and business continuity exercises. Maintain accurate documentation of system configurations, changes, procedures, and technical diagrams for knowledge management and compliance. Qualifications Minimum 7 years of hands-on experience supporting enterprise email and messaging platforms, preferably in large-scale or multi-site environments. Experience managing Microsoft Exchange Server / Enterprise Windows Exchange environments, including mailbox administration, mail flow, system health monitoring, and performance optimisation. Strong working knowledge of Active Directory, including user account management, access control, Group Policy Objects (GPO), and directory-integrated email services. Experience supporting environments with high mailbox volume, ideally at enterprise scale such as 5,000 mailboxes or more. Good understanding of email security controls, including anti-spam, anti-malware, phishing protection, mailbox permissions, transport rules, and secure mail flow configurations. Knowledge of email authentication technologies such as SPF, DKIM, and DMARC. Ability to configure, monitor, and troubleshoot mail flow rules, connectors, delivery queues, routing, and message tracking. Strong troubleshooting skills to resolve email delivery issues, mailbox access problems, performance degradation, and escalated user incidents. Experience in root cause analysis (RCA), incident investigation, and implementing permanent fixes for recurring messaging issues. Familiarity with system maintenance activities, including patching, backup management, vulnerability management, capacity planning, and platform upgrades. Ability to monitor messaging infrastructure health using monitoring tools, logs, dashboards, and performance/statistical reports. Experience with ITIL processes, including Incident Management, Change Management, Problem Management, and Configuration Management. Scripting or automation experience, preferably using PowerShell, Shell, Bash, or Python, to streamline routine administration and reporting tasks. Additional Information We are driven by our AEIOU beliefs—Adventure, Excellence, Integrity, Ownership, and Unity—and we seek individuals who embody these values in both their professional and personal lives. We are committed to our Impact: Valuing our clients, Growing our people, and Creating our future. Together, we make the extraordinary happen. Learn more about us at ncs.co and visit our LinkedIn career site. Scam Alert We are aware of fraudulent job offers and impersonations of NCS recruiters. Phishing emails using convincing-looking but fake addresses are also commonly used to trick you into thinking that they come from official NCS sources. Please note that all official communications from NCS Group will only be sent from verified corporate email addresses. Always check that the sender’s email address ends with the genuine NCS domain, @ncs.com.sg and beware of extra letters, symbols or misspellings. When in doubt, verify the sender’s identity by contacting us at [email protected]. Department: Others

Responsibilities

Ensure the availability, security, and performance of enterprise email and messaging platforms. Manage mailboxes, configure email security solutions, and develop automation scripts to improve operational efficiency.