WHO
About us
At Theory Plus+, we’re two ex-corporate bankers turned strategic partners for startups and high-growth businesses.
We’re not just advisors — we’re problem solvers, growth partners, and your strategic sounding board. We know how to cut through complexity, turn financial pain points into progress, and help you scale with confidence.
Whether you're raising capital, building your finance function, or navigating your next big move, we bring clear thinking, real-world experience, and sharp execution to the table.
Theory Plus+ was born from a belief that great business decisions start with smart thinking — and even sharper follow-through. We blend strategic finance with practical insights, delivering bespoke solutions that grow with your business.
Agile, resourceful, and solutions-first, we work like an extension of your team — focused on what matters, and committed to your long-term success.
With cross-border expertise across Asia Pacific, the UK, and beyond, we offer deep financial knowledge and operational foresight for businesses ready to evolve.
Built for scale. Backed by insight.
Catherine Hermanto, CA, AMCT
Catherine is a strategic finance leader who supports ambitious founders and high-growth businesses through expert CFO advisory.
With deep expertise in finance, treasury, and capital strategy, she helps companies scale with confidence — transforming financial operations, crafting investor-ready frameworks, and optimising treasury for growth and resilience.
A Chartered Accountant (ICAEW) and Certified Treasurer (AMCT), Catherine brings over 15 years of leadership experience across Australia, London, and Singapore. She has delivered multi-million-dollar finance transformations and advised across tech, digital assets, e-commerce, and traditional industries.
Known for her clarity, calm, and commercial edge, Catherine partners closely with founders and executive teams to bridge vision and execution — providing the insight, structure, and financial confidence needed at every stage of growth.
Whether stepping in as a fractional CFO, board advisor, or strategic connector, Catherine offers trusted financial leadership for businesses ready to move forward with purpose.
Angelina Yap, Chartered MCSI
Angelina is a dynamic and results-driven Regional Sales Director with over two decades of experience in banking, wealth management, and market expansion across New York, London, and APAC.
She has a proven track record in driving revenue growth, fostering UHNW and corporate client relationships, and executing strategic sales initiatives. Angelina advises foreign companies on market entry, regulatory compliance, and business development in Singapore and Southeast Asia. Her expertise spans risk management, financial advisory, and operational strategy, helping businesses establish and scale successfully in new markets.
Beyond her corporate achievements, Angelina is a dedicated humanitarian, actively volunteering with the British and New York Red Cross since 2001. She is also known for organising high-impact masterclasses and marketing events targeted at C-suite executives, UHNW individuals, and corporate investors.
Recognized for her strategic mindset, adaptability, and client-focused approach, she is committed to driving business success while making a meaningful impact in both the corporate and philanthropic worlds.