Finance Transformation EPM - Senior Manager - OneStream Solution Architect

Finance Transformation EPM - Senior Manager - OneStream Solution Architect

Location: Toronto

Other locations: Primary Location Only

Date: Sep 12, 2025

At EY, you’ll have the chance to build a career as unique as you are, with the global scale, support, inclusive culture and technology to become the best version of you.

The Opportunity

Recognizing the changing and fast-paced professional landscape, you will team with engagement leadership to bring our broad range of capabilities and insights to enhance the role and effectiveness of the Finance function. We are seeking OneStream Solution Architects to join our EPM practice.

A career in our EPM practice within Consulting services provides opportunities to work alongside Finance leaders to optimize their finance functions.

We help organizations achieve strategic alignment of their finance organization, implement service and cost improvement initiatives, and embed a performance management process and culture that unite the business around its core objectives.

Our EPM team sits within the Business Consulting Finance Transformation practice, which assists clients with:

• Finance Transformation Strategy & Roadmap
• FP&A, Controlling Excellence & Management Reporting
• Finance Operating Model Design
• Finance & Accounting Process Improvement
• Global Business Services including Shared Service Centers, Outsourcing
• As an EPM practitioner, you will either support EPM components of projects in those areas or standalone projects focused on transforming and technology enabling:
• FP&A and Management Reporting
• Integrated Business Planning/Supply Chain Planning
• Automation of Reconciliations

Your Key Responsibilities

We are seeking a highly skilled and experienced OneStream Solution Architect to join our team. In this role, you will be responsible for leading the implementation of OneStream modules, specifically focused on planning, budgeting, forecasting, integrated business planning/supply chain planning, and reporting.

Skills and Attributes for Success

• Collaborating with clients, business analysts, and other stakeholders to gather requirements and understand business needs.
• Designing and developing solutions using OneStream software that meet client's financial and performance management objectives.
• Creating technical architectural designs and documentation, including data models, process flows, integration requirements, and security considerations.
• Designing and developing OneStream solutions, including reports, workflows, forms, data integrations, and custom functionalities.
• Writing efficient, maintainable, and scalable code in OneStream scripting languages.
• Performing system configurations and customizations to meet specific client requirements.
• Conducting unit testing and debugging to identify and fix software defects.
• Participating in system integration activities, including data imports and exports, API integrations, and data validations.
• Providing support and troubleshooting assistance to end-users and system administrators.
• Creating technical documentation, including design specifications, test plans, and user guides.
• Staying updated with the latest releases, features, and functionalities of OneStream software.
• Collaborating with cross-functional teams, including database administrators, business intelligence specialists, and infrastructure teams, to ensure seamless system operations.
• Assisting in system upgrades, patches, and performance tuning activities.
• Contributing to the continuous improvement of development processes and coding standards.
• Assisting in pre-sales activities, including solution demonstrations, proposal development, and client presentations.

To Qualify for the Role, You Must Have

• A strong academic record including a bachelor's degree and a minimum of 8 years’ experience in industry or with a recognized consulting firm.
• Bachelor's degree in Finance, Accounting, Business Administration, Computer Science, or a related field. Advanced degree or relevant certifications are a plus.
• Relevant OneStream certifications (such as OneStream Certified Implementation Consultant, Solution Architect, Developer, etc.)
• Strong understanding of OneStream architecture, modules, and functionalities.
• Proven experience as a Solution Architect, Technical Consultant, or similar role, with a focus on OneStream software.
• Proficiency in OneStream configuration and administration, including metadata management, dimensionality, and security models.
• Experience with integration between OneStream and other enterprise systems.
• In-depth knowledge of finance and accounting principles, along with expertise in EPM processes and methodologies.
• Ability to translate current customer spreadsheet or other financial systems to effective and efficient OneStream solution.
• Deep understanding of planning processes, including G&A Planning, HR Planning, Capital Expense Planning, Project Planning.

Ideally, You’ll Also Have

• Strong analytical and problem-solving skills, with the ability to translate business requirements into technical solutions.
• Excellent communication and interpersonal skills, with the ability to collaborate effectively with both technical and non-technical stakeholders.
• Ability to manage multiple projects simultaneously and work independently in a fast-paced environment.
• Willingness to travel to client sites as needed.

What We Offer

We offer a competitive compensation package where you’ll be rewarded based on performance and recognized for the value you bring.

• Continuous learning: you’ll develop the mindset and skills to navigate whatever comes next.
• Success as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.
• Transformative leadership: We’ll give you the insights, coaching and confidence to be the leader the world needs.
• Diverse and inclusive culture: You’ll be embraced for how you are and empowered to use your voice to help others find theirs.
• Join us and be part of a team that is shaping the future of business planning and performance management.

Diversity and Inclusion at EY

Diversity and inclusiveness are at the heart of who we are and how we work. We’re committed to fostering an environment where differences are valued, policies and practices are equitable, and our people feel a sense of belonging.

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