Senior System Engineer

Alter Domus Luxembourg S.à r.l.; City of Westminster; On-site; GBP 60,000 - 80,000; Full time

Job summary

A global financial services firm is seeking a Microsoft 365 Specialist to enhance management and security of its environment while improving end-user experience. This role includes overseeing Microsoft 365 licenses, implementing security protocols, and providing technical support. Candidates should have 6+ years of IT experience and excellent communication skills. The position offers flexible arrangements, generous holidays, and support for professional accreditations.

Benefits

Support for professional accreditations

Flexible arrangements

Continuous mentoring

Employee Assistance Program

Employee Share Plan

Qualifications

• Minimum of 6 years of relevant experience in the IT industry.
• Exceptional oral and written communication skills.
• Detail-oriented and organized with a proven ability to meet deadlines.

Responsibilities

• Manage and support the Microsoft 365 environment.
• Collaborate with cross-functional teams to integrate solutions.
• Monitor system performance and security incidents.

Skills

Mail flow management

Hybrid configurations

Transport rules

Defender XDR

PowerShell scripting

Active Directory management

Customer service

Job description

Microsoft 365 Administration

Alter Domus is seeking a skilled and proactive Microsoft 365 Specialist (Senior System Engineer) to join our Global IT Operations team. This role is essential in ensuring the effective deployment, management, and security of our Microsoft 365 environment, while engaging with key stakeholders to enhance end‑user experience. The ideal candidate will have a deep understanding of the Microsoft ecosystem and be responsible for implementing best practices to safeguard data and boost productivity across the organization.

Responsibilities

• Manage and support the Microsoft 365 environment, including Exchange Online, Intune, SharePoint, Defender, Entra ID, and Teams.
• Collaborate with cross‑functional teams to integrate Microsoft 365 solutions with existing systems and workflows, enhancing overall operational efficiency.
• Oversee the procurement, allocation, and management of Microsoft 365 licenses, ensuring compliance with licensing agreements and optimizing license usage across the organization.
• Implement and maintain security protocols and best practices (CIS) to protect sensitive data within the Microsoft ecosystem, including user access controls, data loss prevention, and threat protection measures.
• Monitor system performance and security incidents, generating reports and insights to inform decision‑making and improve service delivery.
• Deliver technical support and training to Level 1 and Level 2 teams.
• Stay updated on the latest Microsoft 365 features and security trends, recommending enhancements and upgrades to improve functionality and security posture.
• Develop and maintain comprehensive documentation that supports end‑user operations, including guides for troubleshooting common issues, step‑by‑step instructions, and best practices.

Technical Expertise

• Advanced expertise in mail flow, hybrid configurations, transport rules, connectors, and accepted domains. Strong troubleshooting: message trace, header analysis.
• Strong knowledge in Conditional Access, Identity Protection, MFA, Single Sign‑On.
• Intune Management: Device compliance, Windows Autopatch & Autopilot, security baselines, configuration profiles, update rings, and app deployment.
• Defender XDR ecosystem: Defender for Endpoint, Identity, Office, Cloud Apps.
• PowerShell, Graph API queries, automation scripts, bulk provisioning.
• Proficient in managing Active Directory and Group Policy.
• Proven experience in End User Experience Support, with a focus on delivering high‑quality service and support.
• Knowledge of the Apple ecosystem (JAMF) would be considered an advantage.

Your Profile

• Minimum of 6 years of relevant experience in the IT industry.
• Exceptional oral and written communication skills.
• Detail‑oriented and organized, with a proven ability to meet deadlines in a fast‑paced environment.
• Strong work ethic, responsiveness, and a commitment to customer service excellence.
• Excellent team player with strong interpersonal skills.
• Self‑motivated and capable of thriving in a project‑based environment.

Benefits

• Support for professional accreditations such as ACCA and study leave.
• Flexible arrangements, generous holidays, plus an additional day off for your birthday!
• Continuous mentoring along your career progression.
• Active sports, events, and social committees across our offices.
• 24/7 support available from our Employee Assistance Program.
• The opportunity to invest in our growth and success through our Employee Share Plan.
• Plus additional local benefits depending on your location.

As a world‑leading provider of integrated solutions for the alternative investment industry, Alter Domus is proud to be home to 90% of the top 30 asset managers in the private markets, and more than 6,000 professionals across 24 jurisdictions.

We celebrate our differences and believe that our success relies on diverse perspectives and experiences. We are committed to ensuring a welcoming recruiting and onboarding process for everyone. If you require accommodations to make the recruitment process more accessible, please contact our hiring team.