Applications Architect - Senior

Position Overview

The Senior Applications Architect will be responsible for defining, designing and managing enterprise application architectures across complex, large-scale IT environments.

The role involves developing application, information and security architectures, defining system integrations, identifying reusable components, and ensuring alignment with enterprise architecture standards.

The successful candidate will work with business and technical stakeholders to translate business requirements into technical architecture solutions, guide projects through architecture governance processes, and ensure successful implementation across multiple interconnected systems.

Key Responsibilities

• Define application architecture structures, logical components and relationships between systems.

• Design and manage enterprise application architectures across complex IT environments.

• Develop cross-platform applications in large and distributed environments.

• Define interactions between application packages, databases, middleware and integration platforms.

• Design secured system-to-system integrations using web services and APIs.

• Identify reusable components, application interfaces and architecture standards.

• Conduct systems analysis, solution design and technical requirement definition.

• Develop enterprise architecture models, documentation and deliverables.

• Guide projects through architecture governance processes, including checkpoints and approvals.

• Evaluate solution options, alternatives, risks and cost-benefit considerations.

• Facilitate Joint Application Development (JAD) sessions and stakeholder meetings.

• Resolve complex business and IT architecture issues.

• Ensure compliance with Ontario Public Service architecture methodologies and GO-ITS standards.

Required Skills & Experience

Business Architecture

• 10+ years of experience as a Business/Applications Architect following the Zachman Framework.

• Experience working on large-scale programs involving multiple highly interdependent systems.

• Strong experience designing secured system-to-system integrations using Web Services and API-based architectures.

• Experience facilitating JAD sessions and translating business needs into technical requirements.

• Ability to document business processes, business requirements and system requirements.

• Experience evaluating solution implementation options, alternatives, risks and recommendations.

• Experience conducting cost-benefit analysis and presenting recommendations to senior decision-makers.

• Experience in requirements management, quality assurance and change management.

• Strong stakeholder management and issue-resolution capabilities.

Application / Information / Data Architecture

• 10+ years of experience as an Application, Information or Security Architect.

• Experience designing architectures for custom-built applications, COTS and cloud-based solutions.

• Strong understanding of Architecture Governance Processes, including gating, checkpoints and approvals.

• Experience guiding projects through architecture governance processes.

• Experience developing enterprise application and information architecture artifacts.

• Experience with Microsoft Azure cloud-based applications.

• Knowledge of Microsoft Power Automate (Flow) and Logic Apps.

• Strong experience in API design, integration and technical requirements definition.

• Knowledge of UML, system analysis, solution design and use-case-driven modelling.

• Experience with conceptual, logical and physical application and information architecture.

• Strong data modelling experience, including conceptual, logical, physical and dimensional data models.

• Experience planning complex, multi-platform and multi-tier IT systems.

• Experience documenting application architecture security requirements.

Tools & Technologies

• Expert-level experience with PowerDesigner for developing architecture models across all architecture domains.

• Strong proficiency in Microsoft Office:

  • Word

  • Excel

  • PowerPoint

  • Visio

Coordination, Communication & Soft Skills

• Excellent written and verbal communication skills.

• Strong stakeholder management and consensus-building abilities.

• Ability to resolve issues involving multiple teams and stakeholders.

• Ability to communicate complex technical concepts to non-technical audiences.

• Experience coordinating multiple projects with competing priorities.

• Ability to work under pressure and meet strict deadlines.

Public Sector / Ontario Public Service Experience

• Experience with Ontario Public Service (OPS) enterprise architecture methodologies and processes.

• Knowledge of applicable Government of Ontario IT Standards (GO-ITS).

• Experience with Threat Risk Assessments (TRAs) and Privacy Impact Assessments (PIAs).

• Experience with Government of Ontario architecture deliverables, including the Zachman Framework.

• Knowledge of OPS architecture approval processes, policies and procedures.

Must-Have Requirements

Critical Screening Criteria

Candidates must demonstrate the following experience:

1. 10+ years of experience as a Business/Applications Architect using the Zachman Framework.

2. Experience working on large-scale programs involving multiple highly interdependent systems.

3. 10+ years of experience as an Application, Information or Security Architect across custom-built, COTS and cloud-based solutions.

4. Strong understanding of Architecture Governance Processes, including gating and checkpoints.

5. Proven experience guiding projects through architecture governance approvals.

6. Proven experience in API design, integration and technical requirements definition.

7. Experience in conceptual, logical, physical and dimensional data modelling.

8. Expert-level experience using PowerDesigner for architecture modelling.

Preferred Candidate Profile

The ideal candidate should have:

• Extensive enterprise architecture experience within large government or public-sector environments.

• Strong knowledge of the Zachman Framework.

• Hands-on experience with PowerDesigner.

• Experience with Azure cloud architecture, APIs, Logic Apps and Power Automate.

• Experience preparing enterprise architecture documentation and governance deliverables.

• Previous Ontario Public Service (OPS) experience.

• Knowledge of GO-ITS standards, TRA and PIA processes.

Recruitment Notes

• Work Arrangement: Mandatory onsite attendance, five days per week.

• Location: 777 Bay Street, Toronto.

• Submission Limit: Only one candidate can be submitted.

• Deadline: November 18, 2026, at 1:00 PM.

• Screening Priority: Prioritize candidates with 10+ years of architecture experience, Zachman Framework expertise, PowerDesigner proficiency and enterprise architecture governance experience.