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Nicholas Allen

Senior Systems Engineer

• Identity • Email • Security • Automation •

Chaotic neutral, bound by corporate bylaws.

👋 I'm a Senior Systems Engineer with over a decade in IT, specializing in corporate infrastructure & security for fast-moving M&A environments.

I build & govern Microsoft 365 + Azure ecosystems: identity (Entra ID), email security (Mimecast, DMARC/DKIM/SPF), & collaboration platforms (SharePoint/Teams/Exchange), with an emphasis on governance, resiliency, & automation.

I’m often pulled into Tier 3 escalations and cross-system weird problems. I make them boring again.

I make complex infrastructure boring: secure, resilient, repeatable.

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🧰 My Toolbox

Cloud & Tenant Architecture

Azure + M365 tenant standards, Entra lifecycle, & scalable patterns for M&A environments.

Microsoft Azure
Microsoft 365
Microsoft Entra ID

Messaging & Collaboration

Exchange, Teams, & SharePoint governance with escalation support across systems.

Microsoft Exchange
Microsoft Teams
Microsoft SharePoint

Email, Security & Compliance

Mail flow hardening, threat protection, and compliance controls (DMARC/DKIM/SPF, retention, labeling).

Mimecast
Microsoft Purview
SentinelOne

Identity & Resilience

Privileged access, identity controls, and recovery readiness, so incident day stays boring.

Delinea
Beyond Identity
Rubrik

Automation & Integration

PowerShell + Power Platform automation with Graph integrations & Copilot-assisted workflows.

PowerShell
Power Automate
Microsoft Graph

Edge, DNS & Linux

DNS architecture, forwarding/redirect patterns, & Linux-based operations & troubleshooting.

Azure Front Door
DNS
Linux