London, United Kingdom
Hybrid
Job ID:
18949
Date posted:
December 05 2025
Category:
Technology
Job Level:
Manager
Senior System Engineer
ABOUT US:
As a world leading provider of integrated solutions for the alternative investment industry, Alter Domus (meaning “The Other House” in Latin) 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.
With a deep understanding of what it takes to succeed in alternatives, we believe in being different - in what we do, in how we work and most importantly in how we enable and develop our people. Invest yourself in the alternative, and join an organization where you progress on merit, where you can speak openly with whoever you are speaking to, and where you will be supported along whichever path you choose to take.
Find out more about life at Alter Domus at careers.alterdomus.com
JOB DESCRIPTION:
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. You will also engage with key stakeholders and leverage your technical expertise to enhance end user experience. This position requires a blend of technical expertise, problem-solving skills, and effective communication to ensure seamless operations and support for our global user base. The ideal candidate will possess a deep understanding of Microsoft ecosystem, particularly Microsoft 365 services, and will be responsible for implementing best practices to safeguard our data and enhance productivity across the organization.
Key Responsibilities:
Microsoft 365 Administration
- Manage and support the Microsoft 365 environment, including Exchange Online, Intune, SharePoint, Defender, Entra ID and Teams.
Collaboration and Integration
- Collaborate with cross-functional teams to integrate Microsoft 365 solutions with existing systems and workflows, enhancing overall operational efficiency.
License Management
- Oversee the procurement, allocation, and management of Microsoft 365 licenses, ensuring compliance with licensing agreements and optimizing license usage across the organization.
Security Management
- 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.
Monitoring and Reporting
- Monitor system performance and security incidents, generating reports and insights to inform decision-making and improve service delivery.
Support and Training
- Deliver technical support and training to the Level 1 and Level 2 teams.
Continuous Improvement
- Stay updated on the latest Microsoft 365 features and security trends, recommending enhancements and upgrades to improve functionality and security posture.
Documentation
- Develop and maintain comprehensive documentation that supports end user operations, including guides for troubleshooting common issues, step-by-step instructions and best practices.
Technical Competencies
- 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, 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.
WHAT WE OFFER
We are committed to supporting your development, advancing your career, and providing benefits that matter to you.
Our industry-leading Alter Domus Academy offers six learning zones for every stage of your career, with resources tailored to your ambitions and resources from LinkedIn Learning.
Our global benefits also include:
- 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
Equity in every sense of the word:
We are in the business of equity, in every sense of the word. For us, this means taking action to ensure every colleague has equal opportunity, valuing every voice and experience across our organisation, maintaining an inclusive culture where you can bring your whole self to work, and making Alter Domus a workplace where everyone feels they belong.
We celebrate our differences, and understand that our success relies on diverse perspectives and experiences, working towards shared goals and a common purpose. We take pride in creating a workplace where all our people are empowered to be truly invested in the alternative and bring their whole selves to work.
We are committed to ensuring a welcoming recruiting and onboarding process for everyone. Please contact our hiring team if you require any accommodations to make our recruitment process more accessible for you.
(Alter Domus Privacy notice can be reviewed via Alter Domus webpage: https://alterdomus.com/privacy-notice/)
#LI-HYBRID #LI-DH1
Our stories
Amanda Donohue, Senior Manager, Cork
Think ahead to five years’ time and where you would like to see yourself. That’s what I did and Alter Domus offered me the right path.
Aristidis Halikias, Managing Director, Chicago
Many might think that the financial services industry is primarily numbers and math, but I believe we are a people business. The people at Alter Domus make it what it is, and we have some of the best in the entire industry.
Carla Walmsley, Senior Manager, Jersey
Alter Domus were fully supportive through my studying path, providing study support in the way of study fees and study leave, as well as some flexible working towards nearer each exam to help me manage with work/life (and exam!) balance.
Shania Galea, Corporate Services Officer, Malta
As a junior, I learn a lot from all colleagues around me. In addition, the AD Academy keeps on providing us with all the training we need.