IT Sr Manager, Applications Engineering - Legacy Systems
Job Description
Job Description:
The IT Integrations Manager is responsible for leading the design, delivery, and modernization of enterprise integrations across both legacy (mainframe) systems and modern application platforms.This role will initially oversee a team supporting mainframe-based integrations, ensuring stability, reliability, and continuity of business-critical data flows. In parallel, the role will transition into leading a modern enterprise integrations and .NET development team, driving API-based integrations, data platform connectivity, and reporting/analytics enablement (e.g., Power BI).
This leader will play a key role in bridging legacy and future-state architectures, enabling the organization’s transition toward a scalable, cloud-enabled integration and data ecosystem.
Key Responsibilities
1. Integration Strategy & Architecture
Define and execute the enterprise integration strategy spanning legacy and modern platforms
Establish integration patterns (APIs, messaging, ETL, event-driven) and standards
Partner with Data & Analytics leadership to align integrations with data lake and reporting initiatives
2. Legacy System Leadership (Interim)
Lead the team supporting mainframe/legacy integrations and interfaces
Ensure stability, performance, and reliability of existing integrations
Document and rationalize current-state integrations and dependencies
Develop a roadmap for coexistence, simplification, and eventual decommissioning of legacy systems
3. Modern Integration & .NET Leadership (Future State)
Transition into leadership of a .NET-based integrations and development team
Oversee development of APIs, services, and integration components (.NET, C#, Web APIs)
Drive modernization toward reusable, scalable integration services
Align development efforts with enterprise architecture and cloud platform (Azure preferred)
4. Data Platform & Reporting Integration
Enable integration with enterprise data platforms (data lake, Azure SQL, etc.)
Support ingestion pipelines for analytics and reporting use cases
Collaborate with Power BI and analytics teams to deliver reliable, governed data flows
Improve data quality, consistency, and governance across systems
5. Integration Delivery & Platform Management
Oversee APIs, middleware, ETL pipelines, and system interfaces
Manage integration lifecycle (design, build, deploy, monitor, optimize)
Ensure performance, scalability, and observability of integrations
Support SQL Server and data integration performance tuning
6. Team Leadership & Transition Management
Lead a hybrid team of:
Legacy/mainframe integration resources (short-term)
Modern integration engineers and .NET developers (long-term)
Drive transition planning from legacy skillsets to modern integration capabilities
Manage Agile delivery, backlog prioritization, and capacity planning
7. Governance, Security & Compliance
Establish integration governance, standards, and documentation practices
Ensure secure data movement and adherence to enterprise policies
Implement monitoring, logging, and auditing for integrations
8. Stakeholder & Cross-Functional Collaboration
Partner with:
Enterprise Applications
Data & Analytics teams
Business stakeholders
External vendors/partners
Act as the primary IT leader for integration-related initiatives and decisions
Required Qualifications
10+ years in IT with strong experience in systems integration and application development
Experience supporting legacy/mainframe systems and integrations
Experience with modern integration technologies (APIs, ETL, middleware)
Strong background in .NET development (C#, ASP.NET, Web APIs)
Strong experience with SQL Server, ETL and data integration concepts
Experience leading technical teams across both legacy and modern environments
Familiarity with cloud platforms (Azure preferred)
Preferred Qualifications
Experience integrating ERP platforms (SAP, D365, etc.)
Experience supporting data lake or analytics ecosystems
Experience with Power BI or enterprise reporting platforms
Experience with integration platform tools (iPaaS, messaging frameworks)
Key Success Metrics
Stability and reliability of legacy integrations during transition
Reduction in legacy integration complexity over time
Successful migration to modern API-based architecture
Improved availability and quality of data for reporting/analytics
Delivery velocity and quality of .NET integration services
Alignment between application, integration, and data strategies
Position Impact
Ensures continuity of critical legacy operations
Enables transition to a modern, scalable integration architecture
Acts as a key bridge between enterprise applications, integrations, and analytics
Directly supports AAON’s future-state data and reporting capabilities