Senior Staff Engineer

What you'll do: Own the architecture, roadmap, engineering standards, and lifecycle management of Exchange Online and enterprise email security services Design and support secure, highly available mail flow, including connectors, transport rules, SMTP relays, and hybrid integrations Lead resolution of complex messaging issues through message traces, headers, logs, and service telemetry, serving as the senior escalation point Implement email security and domain protection controls (SPF, DKIM, DMARC, TLS, anti-phishing, anti-malware, encryption) Lead tenant migrations, M&A integrations, domain consolidations, and large-scale platform transformations Build automation, monitoring, and reporting using PowerShell, Microsoft Graph, and AI/Copilot-powered solutions Establish runbooks, documentation, and disaster recovery procedures, and mentor junior engineers Collaborate with product, engineering, and QA teams in an Agile/Scrum environment

What you bring: Bachelor's degree and 8 years of related experience (or Master's and 7 years, or equivalent combination) 5+ years supporting enterprise-wide platforms and 7+ years of progressive IT experience Senior-level Microsoft 365 experience in medium-to-large enterprises, with deep expertise in Exchange Online and Exchange On-Premises Hands-on experience administering hybrid Exchange environments Experience with enterprise email security solutions (Proofpoint, Mimecast, Defender for Office 365, or Cisco Secure Email), including migrations or platform transitions Experience mentoring engineers and a strong customer-service mindset

Nice to have: Entra ID administration (Conditional Access, Authentication Policies, user lifecycle) PowerShell scripting and automation Microsoft certifications (MS-102, SC-300, or similar)