L3 Microsoft Windows Exchange Admin

Job Description

Role - L3 Exchange Server Administrator

Location - Switzerland - Geneva

• Administer and maintain Microsoft Exchange Server 2013/2016/2019 and Exchange Online (Office 365).
• Handle L3 escalations from L1/L2 support teams and resolve complex messaging issues.
• Design and implement Exchange infrastructure solutions including DAGs, hybrid configurations, and mail flow rules.
• Monitor system performance, message queues, and logs to ensure optimal operation.
• Manage mailbox databases, perform mailbox moves/restores, and handle retention policies.
• Manage and troubleshoot Lotus Notes environments and support coexistence/migration scenarios.
• Administer and support enterprise email security and archiving tools.

• Trend Micro (Email Security, Deep Discovery)
• Proofpoint (Email Protection, TAP)
• Voltage Secure Mail (Data encryption and secure email delivery)
• Menlo Security (Web isolation and threat protection)
• Source One (Email archiving and eDiscovery)

• Automate administrative tasks using Power Shell scripting.
• Implement and manage security protocols including Exchange Online Protection (EOP), anti-spam, and anti-malware policies.
• Collaborate with Active Directory, Azure AD, and other infrastructure teams for integrated solutions.
• Lead Exchange migration projects (e.g., on-prem to cloud, tenant-to-tenant).
• Ensure compliance with IT policies, perform audits, and maintain documentation.

• Deep knowledge of Microsoft Exchange Server (2013/2016/2019) and Exchange Online.
• Expertise in Lotus Notes, Trend Micro, Source One, Proofpoint, Menlo, and voltage appliances.
• Strong Power Shell scripting skills.
• Experience with hybrid Exchange environments and migrations.
• Familiarity with Active Directory, DNS, and SMTP protocols.
• Understanding of security and compliance features in Microsoft 365.
• Strong level of English and confident communicator.
• Good decision making and analytical skills.
• Strong team player with good interpersonal skills.
• Desire for continual learning.
• Intensely driven, proactive and delivery focused.
• Must be flexible and open-minded – due to the nature of support work, each day is different, and workers must be willing to adapt and change to the changing situations.

Infosys is a global leader in next-generation digital services and consulting. We enable clients in 56 countries to navigate their digital transformation. With over three decades of experience in managing the systems and workings of global enterprises, we expertly steer our clients through the many next of their digital journey. We do it by enabling the enterprise with an AI-powered core that helps prioritize the execution of change.

We also empower the business with agile digital at scale to deliver unprecedented levels of performance and customer delight. Our always-on learning agenda drives their continuous improvement through building and transferring digital skills, expertise, and ideas from our innovation ecosystem.

Visit  to see how Infosys can help your enterprise navigate your next.

All aspects of employment at Infosys are based on merit, competence, and performance. We are committed to embracing diversity and creating an inclusive environment for all employees. Infosys is proud to be an equal opportunity employer.