Ref: RQ11575
Contract – 12 Months (Extension Possible) Onsite – Toronto (595 Bay St.)
Posted Date: 2026-10-26
Location: Onsite – Toronto (595 Bay St.)
Public Sector Experience: Required – OPS / Public Sector
Contract End Date: 2027-10-01 *
Rate: $109/hour
Overview Lotus is seeking a Senior Data Architect/Modeller to join the Government Services Integration Cluster under the Ministry of Public and Business Service Delivery and Procurement. In this role, you will design and implement enterprise-level data architectures in a complex distributed environment, supporting interoperability, information exchange, and data sharing across multiple business domains. You will work closely with business and technical stakeholders to develop canonical, semantic, and common data models that align with enterprise strategy and data governance objectives.
Key Responsibilities Develop and implement data architecture for application development in complex and distributed environments, including data flow, database locations, and data access methods
Develop conceptual, logical, and physical data models to support enterprise data strategies
Create and maintain enterprise, common, canonical, and domain data models that enable interoperability and information exchange across multiple business domains
Develop semantic data models, controlled vocabularies, business glossaries, canonical business definitions, reference data structures, and semantic relationship models
Define business entities, relationships, hierarchies, attributes, and business rules to support data governance
Facilitate business and technical workshops to define and reconcile business terminology, entities, relationships, and canonical definitions
Apply domain-driven modelling and business capability analysis to develop common data models
Establish modelling standards, naming conventions, and metadata requirements




Design reference data and master data structures to support data integration and modernization initiatives
Develop architecture artefacts and checkpoint deliverables with traceability to business architecture requirements
Support data migration, integration, and modernization initiatives
Provide data interoperability and information exchange recommendations aligned with enterprise architecture governance processes
Must-Have Requirements Demonstrated hands-on experience developing conceptual, logical, and physical data models
Extensive experience developing enterprise, common, canonical, and domain data models that support interoperability, information exchange, and data sharing across multiple business domains
Deep knowledge of data architecture principles, methodologies, standards, and best practices
Demonstrated experience establishing common business definitions, controlled vocabularies, semantic models, and common data models to support interoperability, information sharing, and enterprise data governance
Experience facilitating business and technical workshops to define and reconcile business terminology, business entities, relationships, and canonical definitions
Experience using data modelling tools such as ERwin, PowerDesigner, Visio, or equivalent CASE tools
Experience developing semantic data models, business glossaries, controlled vocabularies, and reference data models
Experience establishing modelling standards, naming conventions, and metadata requirements
Experience supporting data migration, integration,



and modernization initiatives
Knowledge of metadata management, data lineage, and data governance principles
Strong analytical, problem-solving, and written/verbal communication skills
Experience with at least two different platforms, operating systems, environments, database technologies, languages, or communications protocols
Nice-to-Have Skills Experience developing common data models, business vocabularies, and semantic frameworks for regulatory, permitting, licensing, compliance, or public-sector programs involving multiple business domains
Experience with semantic modelling, ontology development, or knowledge graph concepts
Knowledge of RDF, OWL, graph databases, or semantic technologies
Experience with Databricks, Neo4j, Denodo, or equivalent data platforms
Experience with metadata repositories and governance solutions
Knowledge of Information Management principles, concepts, policies, and practices
Knowledge and understanding of AODA and related standards
Experience supporting permitting, regulatory, licensing, or public sector business domains
Experience with middleware and gateways
Knowledge of object-oriented analysis and design techniques
Experience developing enterprise architecture deliverables based on Ontario Government Enterprise Architecture processes and practices
Work Setting This is a fully onsite role based at 595 Bay St., Toronto, 5 days per week. No security clearance is required. The role operates within the Government Services Integration Cluster and involves close collaboration with business and technical stakeholders across multiple ministries and business domains.
Final role details, responsibilities, and terms will be confirmed with shortlisted candidates. Compensation may vary based on experience. Errors and omissions excepted.

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📌 Data Architect/Modeller (Ontario)
🏢 Lotus IT Solutions
📍 Ontario