About Us

At Sub One, we’re passionate about helping you transform your finance function with Workday Financials. Our mission is to empower your team to become a forward-looking, strategic partner within your organisation. By embracing real-time accounting, automation, and enriched reporting, we help you move beyond the month-end close and into a more agile, insight-driven future.

Whether you're just starting with Workday or looking to optimise your setup, we’re here to collaborate, guide, and deliver lasting impact.

Let’s shape the future of finance together.

William Leong

I’m a finance professional with nearly 20 years of business transformation experience. A chartered accountant with a Big 4 background, I specialise in streamlining finance functions through automation and process optimisation.

I've led cross-industry projects, delivering tailored, scalable solutions. With technical skills in integration and programming, I work closely with IT teams to implement automation effectively and drive lasting efficiency.

James Keef

I’m a senior finance professional with over 20 years’ experience in multinational companies, including Finance Director roles.

I’ve led global transformation programmes, set up and run shared service centres, and managed large-scale finance migrations across Europe.

My expertise spans all areas of finance transformation, combining hands-on leadership with deep international experience.

Sarath Kumar Prabhakaran

I’m an experienced IT consultant with 13+ years in technology, including roles at Big Four firms.

I specialise in system integration, with a strong focus on Workday Financials and HCM. I've led numerous integration projects using Workday tools and Extend, designing tailored solutions that boost efficiency and data accuracy.

My work covers industries like insurance, tech, and financial services.