Application Engineer

Job Title: Application Engineer (SD/CRM)

Location: Houston, TX (On-site)

Company: Yinlun TDI LLC

About Yinlun TDI LLC

Yinlun TDI LLC is a leading provider of advanced thermal management solutions for the U.S. automotive, commercial truck, and off highway markets. Following the acquisition by Zhejiang Yinlun Co., Ltd., Yinlun TDI has further strengthened its engineering expertise and manufacturing capabilities in the United States.

Headquartered in Houston, TX, Yinlun TDI LLC maintains sales and engineering facilities in California, Michigan, and Illinois. With strong support from our parent company, we are well positioned for continued growth across conventional heat exchangers, hybrid, electric vehicle (EV), and autonomous driving sectors.

Yinlun TDI LLC is an ISO 14001 and IATF 16949 certified manufacturer of heat exchangers and fluid cooling components for automotive, commercial truck, bus, and industrial markets.

Position Overview

We are seeking an Application Engineer (SD/CRM) to support and progressively take ownership of SAP SD, CRM, EDI, and related customer order-fulfillment processes across Yinlun TDI’s North American operations.

Yinlun TDI is implementing SAP S/4HANA together with an integrated system landscape that includes WMS, MES, SRM, CRM, IQC, and other connected applications across the United States and Mexico. This role will provide Level 1 and Level 2 application support, troubleshoot transactional and interface issues, support users, and help maintain reliable day-to-day business operations.

This is a growth-oriented role designed to develop into an internal Level 3 functional owner over time, with increasing responsibility for configuration, functional specifications, system design decisions, and reduced reliance on external consultants.

Key Responsibilities

• Serve as a primary application support contact for SAP SD, CRM, EDI, and customer order-fulfillment processes.
• Support Sales, Customer Service, Program Management, Shipping, and Logistics users.
• Own assigned support tickets from intake through resolution or escalation.
• Document business impact, troubleshooting performed, and final resolution.
• Prioritize issues affecting customer releases, order processing, shipping, ASN transmission, invoicing, and other customer-facing processes.
• Participate in escalation and after-hours support during cutovers, hypercare, major releases, and critical business incidents.
• Develop deep functional knowledge of SAP SD, CRM, EDI, customer master data, pricing, scheduling agreements, deliveries, shipping, billing, and related integrations.
• Maintain functional configuration, process flows, interface documentation, customer-specific requirements, and key decision records.
• Support data quality for customer, ship-to, customer-material, pricing, scheduling-agreement, EDI partner, packaging, labeling, and related master data.
• Understand integration with PP, MM/WMS, FI, MES, and other systems while maintaining primary ownership of the SD/CRM/EDI area.
• Monitor and troubleshoot SAP IDocs, EDI transmissions, middleware jobs, customer portal interfaces, CRM integrations, WMS shipping interfaces, and related batch jobs.
• Diagnose issues involving customer demand, scheduling agreements, sales orders, deliveries, ASNs, invoices, acknowledgments, master data, mappings, and blocked SAP documents.
• Trace transactions across system boundaries and identify the point of failure.
• Coordinate resolution with application, infrastructure, network, and vendor teams.
• Identify recurring failures and drive corrective actions through configuration, master-data, process, or interface improvements.
• Support SAP S/4HANA and connected-system implementations through requirements gathering, fit-gap analysis, configuration validation, testing, defect management, and retesting.
• Coordinate integration testing and UAT with business users.
• Support cutover, data validation, migration, EDI setup, interface activation, go-live, and hypercare.
• Support future releases, upgrades, enhancements, and additional site deployments.
• Build and maintain operational reports, queries, and dashboards.
• Investigate discrepancies involving orders, deliveries, shipping, ASNs, billing, CRM, and EDI.
• Maintain work instructions, quick-reference guides, known-error documentation, and user training materials.
• Train and support business users, key users, and super users.
• Support application roles, authorizations, and periodic access reviews.
• Progress toward Level 3 capability by taking ownership of defined configuration areas and writing functional specifications for reports, interfaces, conversions, enhanceme