Hans Van Ravensberg

Data migration specialist with deep experience executing large-scale enterprise migrations across HCM, CRM, financial, and operational systems. Proven track record delivering zero-defect cutovers by leading data mapping, transformation, validation, and reconciliation for complex legacy environments. Strong hands-on expertise in SQL, ETL design, and cross-system integrations, supporting SaaS implementations and post-acquisition system consolidation, ensure data integrity across diverse partner ecosystems (TPAs, Vendors, and Financial Platforms).

Data and Integration Architect - MANPOWERGROUP - Milwaukee, WI (Remote)

(2022-01 - 2026-12)

• Architected, scripted, and delivered Bullhorn-SQL Server-Oracle Financials integration, leading team of 5 Azure API developers and enabling near-real-time data flow between front-office and finance systems across 30,000-employee global enterprise. Partnered with Accenture using Jira for project management.
• Led end-to-end SQL Server migration of Pivotal Canada to PeopleSoft ERP / Bullhorn CRM, mapping and transforming large-scale datasets while achieving zero critical data defects at cutover.
• Served as lead architect for major enhancements to Manpower candidate rewards application within Oracle Data Warehouse, developed pl/sql stored procedures, created and scheduled refresh for oracle materialized views, leading 2 ETL Informatica developers, improving Power BI reporting performance and data reliability for enterprise users. Partnered with business users to support UAT and resolve data defects through root cause analysis, validation, and collaboration.
• Designed and automated document archival pipelines to SharePoint, reducing manual processing and strengthening audit and compliance readiness.
• Defined and executed an enterprise archival strategy migrating Bullhorn, Pivotal, and Sage databases to Snowflake, decreasing on-prem storage footprint, cutting storage cost by 80%, and allowing for scalable analytics. Performed data cleansing, normalization, quality, and transformation using SQL scripted ETL pipeline. Assigned column-level role-based access control (RBAC) for personally identifiable information (PII).
• Acted as lead application architect for eRecruit to Bullhorn CRM / PeopleSoft ERP migration during Ettain Group acquisition, ensuring data integrity, quality, and governance, system alignment, and on-time delivery.
• Most projects, depending on size, use the Azure DevOps Agile/Scrum environment. Daily status calls and regular design sessions were conducted to ensure project alignment.

Lead Application Architect - ETTAIN GROUP (Acquired by Manpower) - Charlotte, NC (Remote)

(2020-01 - 2021-12)

• Led architecture and execution of Bullhorn / StaffSuite to eRecruit migration following acquisition of Global Employment Solutions, consolidating HCM, CRM and operational platforms, meeting timeline, scope, budget expectations, and ensuring compliance with EEOC, PII and HIPAA regulations.
• Designed and automated custom executive and operational reporting from eRecruit SQL Server database, improving visibility into recruiting, sales, and financial performance.
• Provided subject matter expertise (SME) by architecting data migration frameworks for 3 acquisitions, including source-to-target mapping documents, transformation logic, reconciliation processes, and validation controls.
• Resolved data defects, managed cutovers, and minimized business disruption by partnering with IT, payroll, operations, and acquisition leadership.

Senior Software Architect - GLOBAL EMPLOYMENT SOLUTIONS (Acquired by Ettain Group) - Denver, CO (Hybrid)

(2003-01 - 2019-12)

• Designed and delivered enterprise integrations between StaffSuite CRM and external platforms, including Bullhorn, Great Plains, ADP, banking systems (managing ACH, NACHA, Direct Deposit, Positive Pay, 401K files), and 3rd-party timesheet providers, streamlining time-consuming manual business processes. Most integrations were file-based through SFTP, and required configuration and troubleshooting if needed.
• Architected transaction-based event processing system to handle trigger-generated system events, increasing automation and system responsiveness.
• HCM responsibilities: perform quarterly vertex updates, all updates relates to SUI employer tax (wage base and rates), workers compensation updates (new codes and rates), developed fully automated commission programs, script annual employee benefit setup, developed automated payroll tax setup for employees based on employee address and vertex, developed weekly report for payroll to point out payroll tax discrepancies, generate annual W2/1099 files for processing by 3rd party, developed fully aut
• Served as data migration architect for 10+ acquisitions, leading migration planning, data transformation, validation, reconciliation, and post-cutover support.
• Delivered full software development lifecycle (SDLC) integration projects spanning requirements analysis, architecture, development, testing, deployment, and production support, meeting timeline, scope and budget requirements.
• Acted as senior escalation point for complex production issues, performing root cause analysis and implementing permanent corrective actions.
• Collaborated directly with finance, HR, operations, and executive stakeholders, ensuring technical solutions aligned with business processes.