Senior Enterprise Architect — OT/IT Convergence

Optimal Growth Technologies; Johannesburg; On-site; ZAR 1,200,000 - 1,800,000; Full time

Job summary

Optimal Growth Technologies is seeking an experienced Enterprise Architect in Midrand to provide end-to-end architectural governance, ensuring business processes, OT, applications, integrations, infrastructure, security and support align as a coherent solution.

You will lead design reviews, own cross-domain decisions, maintain an auditable architecture register, and guide teams across OT/IT, Kafka, SAP and integration platforms to production readiness and disaster recovery.

Qualifications

• Senior Enterprise/ Solution Architecture experience leading large, multi-vendor and multi-technology tower programmes through design, implementation, commissioning and operational transition.
• Authority in architecture governance - chairing design reviews, handling exceptions, documenting trade-offs and influencing decisions across organizational boundaries.
• Strong working knowledge of enterprise integration, OT/IT convergence, cyber security, infrastructure, resilience and disaster recovery.
• Ability to produce clear, decision-ready architecture artefacts and communicate risks to engineers, delivery leaders and senior stakeholders.
• TOGAF 9 or higher certified.

Responsibilities

• Lead design reviews; establish design principles, standards and acceptance criteria.
• Act as the single architecture point of accountability for cross-domain decisions.
• Maintain an auditable architecture decision register with rationale, impacts, conditions, approvers and follow-up actions.
• Track technical debt, assumptions, exceptions and architecture risks to closure.
• Ensure solution designs and supplier deliverables remain aligned with the approved architecture.
• Review designs for new sites, components, interfaces and change requests before implementation or formal approval.
• Assess proposed changes for their effect on performance, security, availability, data integrity, supportability and disaster recovery.
• Provide oversight and ownership of solution artefacts
• Provide architectural oversight of the interfaces between OT devices, Applications, Kafka, SAP and integration platforms.
• Define architecture requirements for production readiness, monitoring, service continuity, disaster recovery and the transition into operational support.
• Guide technical teams in resolving issues that cross system or supplier boundaries.
• Assess non-functional requirements and architectural evidence for Cybersecurity, Identity, Network segmentation, Availability, capacity, observability, data integrity, backup, disaster recovery and IT service continuity.

Skills

Architecture governance

TOGAF 9+

Enterprise integration

Cybersecurity

Stakeholder communication

Networking & security

Education

Bachelor's degree in Computer Science or Electrical Engineering

Tools

Kafka

SAP

Integration platforms

CCIE level certification

Job description

Optimal Growth Technologies is seeking an experienced Enterprise Architect in Midrand to provide end-to-end architectural governance, ensuring business processes, OT, applications, integrations, infrastructure, security and support align as a coherent solution.

You will lead design reviews, own cross-domain decisions, maintain an auditable architecture register, and guide teams across OT/IT, Kafka, SAP and integration platforms to production readiness and disaster recovery.