Connectors / Integration
Connect Mosaic and Workday REST to Unify Resource Planning with HR Data
Sync workforce data between Mosaic and Workday automatically, so your teams aren't chasing stale records or doing double entry.
Mosaic + Workday REST integration
Mosaic is a resource management and workforce planning platform that helps organizations forecast capacity, allocate team members, and track project financials. Workday REST handles the HR side — employee records, compensation, org structures, and time tracking. On their own, each does its job well. Connected, project managers get accurate headcount data for planning while HR teams can see how employee time and resources are actually being used across the business.
Resource planning is only as accurate as the HR data behind it. When Mosaic and Workday run separately, you get stale headcount numbers, mismatched role definitions, and manual reconciliation slowing down planning decisions that can't wait. Connecting them means new hires, terminations, role changes, and cost center updates flow automatically into Mosaic — so project leaders always have a live, accurate picture of available capacity. Finance and operations teams benefit too: you can close the loop between planned labor costs in Mosaic and actual compensation data in Workday, which cuts budget variances and makes forecasting something you can actually trust.
Automate & integrate Mosaic + Workday REST
Automating Mosaic and Workday REST business processes or integrating data is made easy with Tray.ai.
Use case
Automated Employee Onboarding into Mosaic
When a new employee is created or activated in Workday, their profile — role, department, cost center, and start date — is automatically provisioned in Mosaic. Project managers can start allocating the new team member to upcoming work right away, without waiting on manual data entry.
- New hires appear in Mosaic the moment they're active in Workday
- Eliminates duplicate data entry across HR and resource management systems
- Resources can be planned from day one instead of days later
Use case
Real-Time Role and Department Change Sync
When an employee's job title, department, or manager changes in Workday, those updates land in Mosaic immediately, keeping resource plans current with your actual org structure. Project managers stop allocating people to work that no longer fits their role or reporting line.
- Resource allocations stay accurate after internal transfers and promotions
- Org chart changes in Workday flow automatically into Mosaic hierarchies
- No manual reconciliation during quarterly reorgs
Use case
Employee Offboarding and Capacity Recalculation
When a termination or leave of absence is recorded in Workday, the integration updates or deactivates the corresponding resource in Mosaic and flags open allocations for reassignment. Project leaders get timely alerts so they can rebalance workloads before deadlines slip.
- Departed employees don't linger on active project plans
- Automated capacity gap alerts go out to project managers immediately
- Reduces project disruption from unplanned attrition
Use case
Labor Cost Reconciliation Between Mosaic and Workday
Planned labor costs from Mosaic resource allocations are automatically reconciled against actual compensation and payroll data in Workday, giving finance teams a clear picture of budget vs. actuals. No more spreadsheet-based reconciliation, and far less risk of budget overruns catching you off guard.
- Finance teams get automated labor cost variance reports
- Cuts manual spreadsheet work for budget reconciliation
- Forecasting gets more accurate when it's grounded in real compensation data from Workday
Use case
Time-Off and Availability Sync for Accurate Capacity Planning
Approved time-off requests and leave periods recorded in Workday are automatically pushed to Mosaic, adjusting each employee's available capacity for the relevant dates. Resource managers can staff projects confidently knowing that PTO, parental leave, and other absences are already accounted for.
- Capacity plans reflect real employee availability without manual calendar checks
- Prevents over-allocation during planned leave periods
- Sprint and project planning accuracy improves across teams
Use case
Headcount Forecast Alignment for Workforce Planning
Future hire records and approved headcount plans in Workday sync to Mosaic so workforce planners can model capacity for roles not yet filled. Resource managers can spot coverage gaps months out and coordinate hiring timelines with actual project demand.
- Future headcount data flows into Mosaic for forward-looking capacity planning
- Talent acquisition timelines line up with project resource demand
- Capacity gaps surface proactively instead of becoming emergencies
Challenges Tray.ai solves
Common obstacles when integrating Mosaic and Workday REST — and how Tray.ai handles them.
Challenge
Handling Workday's Complex Worker Data Model
Workday's REST API exposes worker data through a layered object model — positions, job profiles, organizational assignments — that has to be correctly parsed and mapped to Mosaic's simpler resource fields. Get the field mapping wrong and you end up with incomplete or incorrect resource profiles in Mosaic.
How Tray.ai helps
Tray.ai's visual data mapper and JSONPath transformation tools let teams precisely extract and reshape nested Workday worker objects into the flat field structure Mosaic expects. Mapping templates are reusable and can be updated centrally whenever Workday data structures change, so you're not hunting through workflows one by one.
Challenge
Managing High-Volume Employee Change Events Without Duplication
Large organizations can generate hundreds of worker change events in Workday each day — pay changes, manager updates, location transfers. Processing all of them without creating duplicate or conflicting updates in Mosaic takes careful deduplication logic and sync operations that won't cause problems if they run more than once.
How Tray.ai helps
Tray.ai supports conditional logic and upsert operations natively, so workflows check whether a Mosaic record already reflects the latest Workday state before writing anything. Built-in error handling and retry logic make sure no events are lost during high-volume processing periods.
Challenge
Staying Within Workday API Rate Limits at Scale
Workday REST APIs enforce rate limits that can throttle bulk data pulls, especially during large-scale workforce events like annual reorgs or open enrollment when many records change at once.
How Tray.ai helps
Tray.ai's workflow engine has built-in rate limit management, automatic request throttling, and retry mechanisms that respect Workday's API limits while making sure all records eventually sync to Mosaic without anyone having to step in manually.
Templates
Pre-built workflows for Mosaic and Workday REST you can deploy in minutes.
Sync New Workday Employees to Mosaic as Resources
Workday REST 
Mosaic Automatically creates a new resource profile in Mosaic whenever a new employee is onboarded and activated in Workday REST, mapping fields like name, job title, department, manager, and cost center.
Push Workday Employee Updates to Mosaic Resource Profiles
Workday REST Mosaic Keeps Mosaic resource profiles current by detecting changes to job title, department, cost center, or manager in Workday and automatically updating the matching record in Mosaic.
Deactivate Mosaic Resources on Workday Termination
Workday REST Mosaic When an employee is terminated or placed on extended leave in Workday, this template deactivates their profile in Mosaic and alerts their project managers to review and reassign any open allocations.
Sync Workday Time-Off Approvals to Mosaic Availability
Workday REST Mosaic Automatically adjusts resource availability in Mosaic when a time-off request is approved in Workday, so capacity plans reflect actual employee schedules.
Map Workday Cost Centers to Mosaic Project Budgets
Workday REST Mosaic Pulls active cost center and org unit data from Workday and maps it to project and budget records in Mosaic to keep financial attribution consistent across both systems.
Export Mosaic Planned Labor Costs to Workday for Budget Reconciliation
Mosaic Workday REST Exports aggregated planned labor cost data from Mosaic resource allocations to Workday for comparison against actual payroll and compensation data, enabling automated budget variance reporting.
How Tray.ai makes this work
Mosaic + Workday REST runs on the full Tray.ai platform
Intelligent iPaaS
Integrate and automate across 700+ connectors with visual workflows, error handling, and observability.
Learn more →Agent Builder
Build AI agents that read, write, and take action in Mosaic and Workday REST — with guardrails, audit, and human-in-the-loop.
Learn more →Agent Gateway
Expose Mosaic + Workday REST actions as governed MCP tools — observable, rate-limited, authenticated.
Learn more →Ship your Mosaic + Workday REST integration.
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