Leslie Blumenfeld
Leslie Blumenfeld
Founder & Principal, On Key Technologies
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Principal

Leslie Blumenfeld

Founder & Principal, On Key Technologies

Leslie Blumenfeld is the founder and principal of On Key Technologies. He is a current Qlik Partner Ambassador, a former Qlik Luminary, and one of a select group of practitioners recognized internationally for deep Qlik expertise. His background spans analytics, AI, and application development across a wide range of verticals including manufacturing, distribution, logistics, CPG, financial services, food, pharmaceuticals, and insurance, and he has operated in highly regulated commercial and federal (DoD) environments.

His approach is direct: understand the business problem first, then determine what the technology needs to do. On Key works with organizations that have outgrown their current analytics environment or never got it right in the first place, and delivers outcomes that hold up after the engagement ends.

As principal, Leslie provides direct oversight and accountability on every engagement. Clients work with a team that is assembled to match the scope and complexity of their situation, with Leslie ensuring quality and outcomes throughout.

Leslie Blumenfeld presenting
Leslie Blumenfeld, Qlik Partner Ambassador
How We Work

Principles We Work By

Every On Key engagement is built around a consistent set of working principles that reflect how Leslie approaches client relationships and delivery.

01
Understand the Business First

The technology recommendation comes after we understand the business problem, the organizational context, and the constraints that will determine what actually works. We do not begin with a product or a methodology and work backward.

02
Say What Is True, Not What Is Comfortable

Our clients get direct assessments. If the architecture is wrong, we say so. If the scope does not match the timeline, we say so. An advisor who does not tell you what you need to hear is not adding value.

03
Leave the Client Stronger

The goal of every engagement is to leave the organization more capable than when we started. That means building internal knowledge, not dependency on an external resource.

04
Right-Size the Work

We scope engagements to the actual problem, not a category of services or a standard package. Organizations should pay for what they need, delivered by someone who knows how to deliver it.

05
Adoption Is the Outcome

A dashboard that nobody looks at, a strategy document that sits in a drawer, a platform that only one person knows how to maintain. These are failures regardless of how well they were built. We design for use, not for delivery.

06
Senior Attention Throughout

Leslie is involved in every engagement, not just the proposal. The expertise you engage is present and accountable from kickoff through closeout.

About the Firm

On Key Technologies

A senior-led data and analytics consultancy built to deliver real outcomes for organizations that need more than a standard engagement.

On Key Technologies is a boutique data and analytics consultancy with a flagship Qlik practice. The firm was built on the conviction that most organizations need a trusted, expert-led data partner more than they need another vendor relationship.

On Key works with clients across the enterprise, mid-market, and SMB spectrum, across manufacturing, distribution, financial services, insurance, and strategic operations. Every engagement is led by a recognized expert and measured by whether it improved the client's ability to make decisions with confidence.

On Key operates with a flexible delivery model, combining core team delivery with a curated network of expert collaborators when scope requires additional depth. Clients always have clarity on who is doing the work and why.

Founded on Expertise, Not Scale
On Key prioritizes depth over breadth. Every engagement reflects the full weight of Leslie's expertise and experience.
Flagship Qlik Practice
A recognized Qlik practice led by a current Partner Ambassador and former Luminary, covering the full Qlik product portfolio.
Broad Data and Analytics Capability
Strategy, platform, and analytics services that allow On Key to serve clients across the full data maturity spectrum.
Clients Across Enterprise, Mid-Market, and SMB
Engagements are right-sized to the client, not forced into a standard scope or pricing tier.
Next Step

Ready to Talk?

Every conversation starts with Leslie. No intake form, no business development team. A direct conversation about your situation and whether On Key is the right fit.

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