Senior Systems Engineer

Cantor Fitzgerald•New York, NY

About The Position

The Senior Systems Engineer will play a crucial role in managing and optimizing our Microsoft 365 and Azure environments, ensuring secure and efficient operations. This role involves overseeing complex cross-tenant access scenarios, M&A integrations, and domain migrations, as well as providing expertise in Power Platform, Entra ID, and email security.

Requirements

5+ years of experience in a Microsoft 365 / enterprise systems engineering role, preferably in a large, complex organization.
Proven hands-on experience with M365 cross-tenant migrations and integrations, including mailbox, Teams, and SharePoint migrations.
Deep understanding of multi-tenant organization (MTO) architecture and cross-tenant access policies.
Strong Entra ID / Azure AD skills, including app registrations, conditional access, and guest identity management.
Experience with Power Platform administration, including environment management and service principal governance.
Familiarity with email security standards (DMARC, SPF, DKIM) and enforcement tooling.
ITSM experience, including change management, CHR procedures, and incident management.
Excellent communication skills, both written and verbal, with the ability to collaborate effectively with stakeholders.
Enthusiasm for AI tooling and automation, with a willingness to explore and implement AI-powered solutions for infrastructure and M365 operations.

Nice To Haves

Knowledge of financial services regulatory and compliance requirements is an asset.

Responsibilities

Lead the administration and governance of Microsoft 365 and Azure environments, including Exchange Online, SharePoint Online, Microsoft Teams, and Entra ID.
Manage complex cross-tenant access scenarios, ensuring secure and efficient collaboration across multiple tenants.
Oversee M&A integrations and cross-tenant migrations, including mailbox, Teams, SharePoint, and identity consolidation.
Configure and manage multi-tenant organization (MTO) settings, such as cross-tenant synchronization, shared address books, and calendar federation.
Administer email security and messaging infrastructure, ensuring compliance with industry standards and regulations.
Manage Windows server operations, virtualization, and incident response, with a focus on automation and service improvement.
Collaborate with internal application development teams to ensure optimal utilization of Power Platform services.
Monitor and govern Power Platform database allocations, ensuring efficient resource utilization.
Handle read-only and delegated access requests to Azure and M365 resources, maintaining a secure and controlled environment.
Provide technical ownership and expertise during M&A activities, ensuring a smooth transition and integration of acquired entities.