IT Infrastructure Lead

Job Description

Mosaic Service Partners is seeking an IT Infrastructure Lead to own the enterprise technology foundation that lets the platform scale. This role owns Mosaic's infrastructure, identity, endpoint, collaboration platform, support, cloud governance, and the managed-service-provider relationship end to end. The center of gravity is acquisition integration: most brands Mosaic acquires arrive with fragmented, inherited environments, and this role turns them into a single secure, standardized, scalable estate.

Washington, DC. Hybrid Schedule

Reporting to the VP of Technology, this person owns the IT side of every deal and sets the standard for how HQ and field technology operate across all brands. They set direction on where Mosaic's IT needs to go and do the hands‑on work to get there. The right person is equally comfortable authoring a Day 1 through Day 90 integration plan and getting on a call to transfer firewall administration, billing, and DNS control off an outgoing MSP before the cutover window closes.

This is a hands‑on, individual‑contributor role today. You own the outcomes and do the work directly, without a team beneath you. As Mosaic scales, the role is built to grow into a people leader who sets direction and, in time, builds and leads a team. The role offers deep exposure to post‑acquisition integration, enterprise systems, and IT strategy in a PE‑backed, multi‑brand platform, with meaningful ownership and a clear growth path as Mosaic scales.

• Own IT integration for every acquisition. Build and run a repeatable Day 1 through Day 90 playbook spanning diligence, access and admin transition, onboarding, support routing, device standards, and escalation. Preserve business continuity at close while migrating each acquired brand onto Mosaic standards.
• Set and enforce the Mosaic identity and endpoint baseline. Define one standard for identity, MFA, device management, and endpoint protection, and migrate active users and company‑managed devices across all brand partners onto it.
• Standardize and govern the Microsoft 365 estate. Own tenant strategy and consolidation, SharePoint and One Drive architecture, Teams provisioning, external‑sharing and data‑loss policy, and licensing, so Mosaic stores, shares, and secures business data one governed way.
• Assess and remediate inherited environments. Separate immediate security and access risks from longer‑term cleanup, then drive fixes to completion. Recent deals required transferring admin across 25‑plus systems, decommissioning end‑of‑life servers, consolidating stray domains, and closing MFA and email‑authentication gaps (SPF, DKIM, DMARC).
• Manage the MSP and security partners. Hold CloudIT and security vendors to clear standards, SLAs, and escalation paths, diagnose whether failures stem from vendor capability or weak internal ownership, and decide when to improve, supplement, or replace.
• Run onboarding, offboarding, and end‑user support. Own accounts, access, permissions, and devices across brands, operate responsive support without becoming a field bottleneck, and drive root‑cause fixes over repeat tickets.
• Govern the infrastructure estate. Maintain one reliable source of truth for users, devices, licenses, SaaS, domains, DNS, and cloud accounts; govern production cloud for ownership, access, logging, monitoring, and cost; and set practical guardrails for approved AI and SaaS tools to curb sprawl without slowing the business.
• Support HQ and the field directly. Provide hands‑on HQ support, including office A/V and conference‑room reliability, and travel to brand partners that lack local IT coverage to resolve issues and reinforce standards.
• Perform other duties as assigned or needed.

• Every acquisition is integrated into Mosaic's IT quickly and securely, with minimal disruption to field operations, revenue, or EBITDA.
• All brand partners operate on a single Mosaic standard for identity, MFA, endpoint protection, and the M365 collaboration and file environment, with critical security and access gaps closed.
• The MSP is held to clear standards and measurable outcomes, and Mosaic drives its own decisions…