Senior Engineer, Unified Communications Microsoft 365

Senior Engineer Unified Communications / Microsoft 365

Location: Remote (Must reside in Los Angeles Orange County or San Francisco CA)
Work Hours: 4:00 PM 12:00 AM PST
Compensation: $108000 $140000 base salary
Bonus & Benefits: Full benefits package bonus
Employment Type: Full-Time

HireNow Staffing is partnering with a top-tier Am Law 50 firm to recruit a seasoned and skilled Senior Engineer Unified Communications / Microsoft 365. This role is critical to the stability security and performance of the firms enterprise messaging and collaboration environment and requires deep hands-on expertise across Microsoft 365 and email systems.

This is a long-term core engineering role. Candidates with primarily contract temporary or freelance backgrounds will not be considered.

The Opportunity

This role owns the end-to-end architecture operations and reliability of enterprise Unified Communications and messaging services. You will serve as a senior technical authority for Microsoft 365particularly Exchange Online and hybrid email environmentsensuring seamless email delivery secure collaboration and resilient system performance across the firm.

The ideal candidate brings expert-level knowledge of the complete email lifecycle strong automation skills and the ability to lead complex troubleshooting efforts in a highly regulated high-availability environment.

Role Overview

As Senior Engineer Unified Communications / M365 you will architect support and continuously improve the firms collaboration and messaging platforms. You will partner closely with security infrastructure and application teams while providing Tier 3/4 escalation support and technical leadership across the organization.

Key Responsibilities

Candidates must demonstrate the ability to perform the following responsibilities to be considered for interview:

• Lead the design implementation and ongoing support of Unified Communications solutions with a primary focus on Microsoft 365 and Exchange Online/Hybrid

• Serve as the subject matter expert for enterprise email architecture including routing authentication deliverability and message hygiene

• Administer and support email security platforms including:

  • Proofpoint (DLP encryption TAP routing and policy management)

  • Metadact for metadata scrubbing compliance and secure content handling

• Manage and troubleshoot the full email lifecycle including:

  • DNS configuration

  • SMTP relays

  • Connectors and transport rules

  • Message tracking and diagnostics

• Oversee hybrid Exchange configurations coexistence strategies connectors and migration activities

• Provide Tier 3/4 escalation support for complex UC and messaging issues

• Partner with security infrastructure and identity teams to ensure secure resilient services

• Develop and maintain system documentation architecture diagrams and operational runbooks

• Contribute to UC strategy roadmap planning and lifecycle management

• Participate in audits risk assessments and policy development related to messaging and collaboration systems

Required Qualifications (Must-Haves)

Candidates must meet all of the following to be considered:

• 7 years of experience in Unified Communications Messaging or Microsoft 365 engineering roles

• Expert-level knowledge of Microsoft 365 Exchange Online and hybrid Exchange architectures

• Deep understanding of email flow end to end including:

  • DNS

  • SMTP

  • SPF / DKIM / DMARC

  • TLS

  • Routing topologies

• Hands-on experience with Proofpoint email security solutions

• Working proficiency with Metadact or similar metadata-scrubbing tools

• Strong experience diagnosing and resolving complex UC and messaging issues

• Solid knowledge of identity and security technologies including:

  • Azure AD

  • OAuth

  • Conditional Access

  • MFA

• Proficiency with PowerShell or similar scripting tools for automation and system administration

• Strong job stability and long-term employment history

• Ability to work the required 4:00 PM 12:00 AM PST schedule

Preferred Qualifications (Strongly Emphasized)

Candidates meeting these criteria will receive priority consideration.

• Experience with telephony / VoIP platforms such as Microsoft Teams Phone Cisco Avaya or similar

• Working knowledge of SharePoint Online including permissions site architecture and administration

• Proven experience leading projects and mentoring junior engineers

• Relevant certifications such as:

  • Microsoft 365 Certified: Messaging Administrator

  • MS-100 / MS-203 or MCSE

  • Proofpoint Certified Specialist

  • Other UC or security certifications

• Bachelors degree in information technology Computer Science or equivalent experience

Who Thrives in This Role

Youll be a strong fit if you:

• Enjoy owning complex mission-critical systems end to end

• Take pride in precision reliability and security

• Prefer long-term platform ownership over short-term projects

• Are comfortable acting as a technical authority and escalation point

• Value collaboration documentation and operational excellence

Why This Role Stands Out

• Senior-level ownership of enterprise M365 and UC platforms

• High-impact role within a globally respected legal organization

• Opportunity to influence long-term collaboration and messaging strategy

• Competitive compensation with full benefits and bonus

• Remote flexibility with regional alignment

HireNow Staffing Disclaimer

HireNow Staffing is acting as a direct placement partner for this role. All candidate information is handled confidentially and evaluated against defined requirements.
This job description outlines the general scope of responsibilities and qualifications. Duties may evolve based on client needs and operational priorities. Only candidates meeting core qualifications will be considered for interview.