As a Technical Enterprise Architect at Westernacher, you serve as a strategic sparring partner for our clients in planning and implementing demanding SAP S/4HANA transformations. You combine architectural excellence with a methodical approach and support decision-making processes at management level. In close collaboration with business units, IT teams and Presales, you design sustainable, scalable target architectures and ensure a clear alignment of technology, processes and organization.
Your Responsibilities Design and definition of S/4HANA target architectures (On-Premises, Private Cloud, RISE with SAP) and derivation of clear migration and transformation roadmaps. Evaluation and management of S/4HANA migration scenarios (Brownfield, Selective, Greenfield), including risk, effort and decision analyses. Execution of system readiness analyses and technical prechecks using SAP standard tools (e.g. Readiness Check, Business Transformation Center, Maintenance Planner). Analysis of Simplification Items and derivation of concrete measures for processes, organization and customizing. Responsibility for custom code management, including analysis, decommissioning and refactoring in line with Clean Core principles. Design and governance of integration and interface architectures (RFC, IDoc, APIs, OData, web services) in accordance with SAP ISA-M. Ensuring compatibility with third-party add-ons and legacy systems. Close collaboration with business units, IT, key users and Sales/Presales. Creation and presentation of decision papers, management briefings, and risk and impact analyses. Architectural input on governance, security, change management, testing, training and post-go-live activities.
Your Profile In-depth expertise in SAP S/4HANA architecture, including data models, differences between ECC and S/4HANA, Fiori concepts and end-to-end process understanding. Proven experience in S/4HANA transformations, including migration approaches, readiness assessments, pre-projects (e.g. CVI, Universal Journal, Material Ledger, Asset Accounting) and technical prerequisites. Strong knowledge of custom code and integration architecture, including ATC/SCI, APIs, interfaces, the Clean Core approach and ISA-M. Secure handling of relevant SAP tools and platforms for conversion and modernization (e.g. Readiness Check, SUM/DMO, Fiori, LeanIX, Signavio; SAP Cloud ALM/Solution Manager an advantage). At least 5 years of experience in SAP projects, including at least one S/4HANA conversion, as well as deep know-how in at least two core processes. Pronounced communication and stakeholder management skills at both specialist and management level. Fluent German and English skills, spoken and written.
What We Offer Varied and versatile area of responsibility with many opportunities to shape your work in a 100% employee-owned company. The opportunity to participate in our partnership model. Flat hierarchies, open communication and an international, ambitious team of experienced SAP experts with strong innovation and team spirit. Support for your professional development through systematic training and knowledge exchange. Flexible working hours, home office and attractive compensation.
Since 1969, Westernacher Consulting has stood for innovation and global presence. With a team of over 1,400 consultants in Europe, Asia and America, we offer SAP consulting services worldwide. Our focus is on supporting large and mid-sized companies that strive for innovation, operational excellence and sustainable growth. With our headquarters in Heidelberg, we are pioneers in the innovation of business processes and technologies.
Westernacher values diversity and equal opportunity in the workplace. We consider all qualified applicants regardless of origin, skin color, religion, gender, sexual orientation, nationality, genetic characteristics, disability, age or veteran status. We are also committed to fair employment practices with regard to citizenship and immigration status.
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