M365 Architect

Description
1. Summary
LPL Financial is executing a firm wide modernization of its Microsoft 365 (M365) ecosystem, moving to a multi tenant M365 architecture aligned to Doing-Business-As (DBA) based domains to resolve performance constraints, improve advisor experience, enable modern collaboration (Teams, Copilot), and meet regulatory isolation requirements.
This role provides hands on architectural leadership to validate, design, document, and guide implementation of a multi tenant M365 model and the associated Exchange Online, Identity, and Collaboration workloads. The architect will partner with LPL's Platform Architecture team, DevSecOps, Identity & Access Management, and Microsoft to assure technical feasibility, identify risks, and ensure alignment ahead of key Investment Committee milestones.
2. Objectives of the Engagement
The architect will play a critical role in:
Architectural Validation & Future-State Design
Confirm that the current M365 and identity stack can evolve to support a tens-of-thousands tenant model.
Validate recommended DBA aligned multi tenant recommendation and its implications on email routing, identity, domains, and collaboration workloads.
Assess near term decision gates vs. long term evolution paths.
Risk, Constraints, and Feasibility Analysis
Identify architectural risks related to isolation, mailbox scale, identity consistency, interoperability, and migration throughput.
Provide guidance on compliance, auditability, and administrative boundaries across tenants.
Evaluate implications for Teams, SharePoint, OneDrive, and future Copilot enablement.
3. Key Responsibilities
Architecture & Strategy
Produce authoritative architectural documentation covering:
o Multi tenant Exchange Online design patterns
o Tenant reference architecture & Desired State Configuration
o Domain and DNS provisioning model at scale
o Identity alignment strategy (authentication vs. email address separation, primary login identity, multi domain mapping)
o Cross tenant collaboration and isolation controls
Lead technical deep dives with Microsoft and other partners, ensuring alignment on recommended architecture.
Program Support & IC Readiness
Provide architectural input into executive-facing materials, including:
o Feasibility assessments
o Risk/mitigation summaries
o Trade-off analysis for key decisions (e.g., DBA-only strategy, identity redesign)
Participate in working sessions with program leadership and provide clear architectural rationale.
Technical Oversight & Governance
Review vendor technical deliverables for quality and alignment.
Ensure architectural consistency across Product, Technology, IAM, Security, Compliance, and Operations.
Support definition of non-functional requirements:
o Security isolation
o Compliance enforcement
o Reliability & scale
o Observability & monitoring
o Maintainability & operational model
Migration & Implementation Guidance
Evaluate mailbox migration patterns, throughput assumptions, and automation requirements.
Guide teams on:
o Cross tenant identity and mailbox cutover sequencing
o Handling users supporting multiple practices
o Advisor office isolation requirements
o DNS automation and tenant provisioning at scale
Provide architectural decision records (ADRs), design validations, and redlines.
4. Required Skills & Experience
Core Technical Expertise
Deep architecture experience with:
o Exchange Online, hybrid topologies, large scale migrations
o Azure AD/Entra ID identity patterns
o Cross tenant and multi tenant M365 architectures
o DNS, domains, federation, and email routing in complex environments
o Microsoft 365 Lighthouse and tenant management automation
o PowerShell / Graph API automation at enterprise scale
Migration Experience
Prior delivery of large scale migrations (25k-100k users) in regulated environments.
Experience with migration tools: Quest ODM, BitTitan, Microsoft Migration Tooling.
Security & Compliance
Familiarity with:
o Regulatory isolation requirements
o Multi tenant supervisory controls
o DLP, sensitivity labels, Exchange transport rules
o Audit and monitoring models across tenants
Leadership & Communication
executives.
Strong cross functional leadership across IAM, Security, Operations, and Program PMO.
Experience producing clear, decision ready architectural materials.
5. Deliverables
Architectural Deliverables
Future-state Multi-Tenant Email Architecture Blueprint
Identity Alignment Assessment (login identity vs. email, multiple addresses per advisor)
Domain & DNS Strategy for tens-of-thousands tenant scale
Migration Architecture & Runbook (high level)
Non-Functional Architecture Requirements (security, scalability, observability, maintainability)
Program Deliverables
Risk analysis for major architectural decisions
Technical input for program-status and update checkpoints
Updated technical assumptions and validation of Microsoft recommendations
Quality & Governance
ADRs, redlines, and technical guardrails for vendors
Oversight of architectural artifacts from partners
Skills
Architecture, entraID, MS365, azure, exchange o365, active directory
Top Skills Details
Architecture,entraID,MS365,azure,exchange o365,active directory
Job Type & Location
This is a Contract position based out of Fort Mill, SC.
Pay and Benefits
The pay range for this position is $60.00 - $90.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a hybrid position in Fort Mill,SC.
Application Deadline
This position is anticipated to close on Feb 11, 2026.
>About TEKsystems:
We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.