Senior Systems Engineer
Job in
New York, New York County, New York, 10261, USA
Listed on 2026-09-13
Listing for:
Cleartech Recruiting
Full Time
position Listed on 2026-09-13
Job specializations:
-
IT/Tech
M365, SharePoint & Power Platform, Systems Engineer
Job Description & How to Apply Below
Senior Systems Engineer – M365 & Enterprise Collaboration | NYC (Hybrid) | Global Financial Services
We're partnering with a major global financial services firm to find a Senior Systems Engineer to own their Microsoft 365 platform across a complex, multi-tenant environment shaped by ongoing M&A activity. This is a high-impact individual contributor role at the intersection of enterprise platform engineering, identity management, and corporate integration programmes.
What You'll Be Doing:- Owning Exchange Online, SharePoint Online, Microsoft Teams, and One Drive across a large multi-tenant M365 environment
- Leading cross-tenant migrations and M&A integrations including mailbox migrations, Teams, SharePoint, and identity consolidation
- Managing multi-tenant organisation (MTO) architecture including cross-tenant sync, shared address book, Teams Connect, and calendar federation
- Administering Entra / Azure AD including app registrations, conditional access, RBAC, and guest identity management
- Owning Power Platform administration including environment governance and service principal management
- Managing email security standards including DMARC, SPF, and DKIM
- Handling domain migrations including DNS, SMTP name spaces, UPN changes, and coexistence management
- Operating within formal ITSM frameworks including change management, freeze windows, and incident response
- 5+ years in a Microsoft 365 or enterprise systems engineering role within a large, complex organisation
- Proven hands-on experience delivering M365 cross-tenant migrations and M&A integrations
- Deep expertise in Exchange Online, SharePoint Online, and Teams administration at enterprise scale
- Strong Entra / Azure AD skills including conditional access, app registrations, and guest identity
- Power Platform administration experience including PPAC and environment governance
- Familiarity with email security enforcement tooling (Valimail, EasyDMARC, or equivalent)
- Experience operating in a regulated, multi-entity environment with formal change management processes
- Strong written and verbal communication; able to manage complex stakeholders across a global team
- Experience with migration tooling such as Bit Titan Migration Wiz, Quest On Demand, SPMT, or Sharegate
- Power Shell scripting for M365 and Entra
- Knowledge of financial services compliance requirements as they apply to email, archiving, and data governance
- Ansible automation and Power Platform development
Position Requirements
10+ Years
work experience
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