Technical Architect - SAP

Position: SAP S/4HANA Technical Architect
Experience: 12+ Years

Job Summary

We are seeking an experienced SAP S/4HANA Technical Architect to own the technical architecture and provide end-to-end technical design assurance for a large-scale SAP transformation programme in a public-sector / defence environment.

Key Responsibilities

• Own the end-to-end S/4HANA technical architecture, including system landscape, HANA database, sizing, High Availability (HA) and Disaster Recovery (DR).
• Design deployment topology for on-premise, air-gapped or sovereign-cloud environments, including network segmentation and classified-data handling.
• Define integration architecture using SAP Integration Suite, PI/PO, APIs, OData, IDoc and BAPI.
• Define security architecture covering encryption, key management, IAM/SSO, access controls and system hardening.
• Govern SAP transport strategy, DevOps/CI-CD processes and system refresh/copy strategy with Basis teams.
• Own non-functional requirements (NFRs) covering performance, scalability and availability.
• Lead performance, volume and load-test strategy in coordination with Testing teams.
• Define the technical architecture for data migration and develop the technical cutover runbook.
• Provide technical design assurance and sign-off against agreed project and contractual acceptance criteria.
• Work closely with Functional Architects, Basis, Security, Data Migration, Integration and Testing teams.

Required Experience

• Minimum 12+ years of SAP technical experience.
• At least 5+ years as an SAP Technical / Solution Architect.
• Minimum 2 full-lifecycle SAP S/4HANA implementations where the candidate owned: SAP landscape architecture, Integration architecture, Security architecture.
• Strong experience with S/4HANA on HANA, landscape design, sizing, HA/DR and infrastructure architecture.
• Strong integration experience with SAP Integration Suite / PI-PO, APIs and legacy systems.
• Experience with security architecture, IAM/SSO, encryption, network segmentation and system hardening.
• Strong understanding of performance engineering, capacity planning and NFR management.
• Experience with data migration architecture and cutover planning.
• Public-sector / defence experience is highly preferred, particularly restricted, classified or air-gapped environments.

Education & Certifications

• Degree in Engineering, Computer Science or related discipline.
• SAP certification in a relevant technical area such as S/4HANA System Administration, HANA or Integration.
• SAP Activate awareness.

• TOGAF or equivalent enterprise architecture certification.
• SAP BTP / Integration Suite certification.
• Security certifications such as CISSP, CCSP or ISO 27001 Lead Auditor.
• Relevant cloud/infrastructure certifications.
• Existing or previous Singapore security clearance.

Skills

SAP Implementation, Gap Analysis, Defense, Job Descriptions, High Availability, OData, Public Sector, Integration Architecture, Network Analysis, Sizing, SAP, Sap Business Suite, Sap Migration, Technical Architecture, API, Architecture & Deployment, Training Delivery