More than a consultancy.
A collective.
Our model is different.
Instead of fixed teams or layers of junior resources, every Spire engagement is powered by a handpicked group of senior experts, intentionally designed for the challenge at hand.
A trusted network.
We design bespoke teams that match your goals, your challenges, and your culture, and bring together experts with experience from:
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Top global consultancies and Big Five firms
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World-class branding and creative agencies
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High-growth startups and VC-backed ventures
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Corporate leaders across SaaS, professional services, retail, finance, and more
What it means.
You don’t get a one-size-fits-all framework. You get solutions shaped by selected experts and specialists with deep, real-world experience. Spire gives clients direct access to the expertise they need, only when they need it. Projects stay lean, outcome-focused, and deeply tailored to the organization’s goals and culture.
What we stand for.
Our values guide how we show up for each other and for our clients. They reflect what we believe, how we lead, and the standards we hold ourselves to as a collective.
Impact with Purpose
Human at our core
Rigour and integrity
Collaboration over ego
Growth mindset
Nicolle Sirisko MBA PMP
Founder & CEO
Spire Strategy Group was founded by Nicolle Sirisko, a seasoned executive and consultant who has built her career on the belief that strong leadership is rooted in humanity, empathy, and strategy.​..
Leah Aldin, CPA
Leah is an operations, CX, and digital transformation leader with 17+ years shaping customer-first systems, optimizing processes, and delivering financial rigour across complex, cross-functional environments. She brings CPA-level depth in revenue recognition, contract execution, and program performance.
Areas of Expertise: Process Optimization | Customer Experience & Operations | Digital Transformation | Financial Operations | Program Leadership
Industry & Sector Experience: Finance/FinTech | Supply Chain/Logistics | Public Sector/ Government | Agricultural Technology (AgTech) | Technology/SaaS
Ewan Dunderdale, MBA
Ewan is a senior data, analytics, and AI strategist with 27 years leading enterprise transformations, building consulting practices, and authoring data strategies for major Canadian organizations across regulated and complex sectors. His work spans data monetization, digital infrastructure, and modernization initiatives.
Areas of Expertise: Data Strategy | AI Strategy & Integration | Digital Transformation | Enterprise Analytics | Strategic Planning | Business Model Design | GTM Strategy
Industry & Sector Experience: Artificial Intelligence/Machine Learning | Professional Services | Energy/Utilities | Nonprofit/Social Impact | International Development | Healthcare | Education
Carine Rozen-Marom, MBA
Carine is a strategic leader with 15+ years of international consulting experience advising Fortune 500 organizations and high-growth start-ups across technology, consumer goods, healthcare, infrastructure, and emerging sectors. She is known for leading complex, end-to-end initiatives and translating data into clear, compelling insights that drive market differentiation, operational clarity, and sustainable growth.
Areas of Expertise: GTM Strategy | Brand Strategy | Business Model Design | Strategic Planning | Market Research | Competitive Analysis | Governance & Org Design | HR Advisory
Industry & Sector Experience: Healthcare | Pharmaceutical | Biotech | Artificial Intelligence & Machine Learning | Cybersecurity | CPG | Retail & E-Commerce | Real Estate | Manufacturing
Jake Wiegand, MBA
Jake is a business planning and revenue operations leader who turns complex commercial challenges into clear, data-driven strategies that strengthen forecasting, alignment, and profitable growth. He brings deep experience enabling cross-functional decisions through analytics, financial modelling, and GTM insight.​
Areas of Expertise: Strategic Planning | Revenue Operations | Forecasting & Analytics |
GTM & Commercialization | Pricing Optimization
Industry & Sector Experience: Technology/SaaS | Telecommunications | Consumer Products |
Retail/E-Commerce
Interested in working with us?
We partner with a curated collective of senior-level consultants and specialists across strategy, operations, branding, marketing, finance, and business development.
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If you’re an established expert who values collaboration, autonomy, and meaningful work, we invite you to learn more about joining the Spire collective.