Jack Yang is the visionary leader and driving force behind JBC. With over a decade of experience in business strategy, private equity, and corporate growth, Jack founded JBC in 2023 to empower businesses with actionable strategies and sustainable success.

His personal involvement in every key project ensures that clients receive expert guidance, data-driven insights, and innovative solutions that lead to real results.

Serene is a Senior Manager at JY Sigma Business Consulting (JBC) with 27+ years of experience in banking—spanning customer service, operations, and risk management. After leaving the bank in 2017, she explored side hustles, joined Evergreen in 2021, and now thrives at JBC.

With no sales background, she built a $3M portfolio and helped 60+ clients earn 10% annual returns. She values trust, provides top service, and ensures clients stay informed.

With a strong background in banking and corporate finance, I have 10+ years of experience working with SMEs and high-growth firms in Singapore. As a former banker, I structured financing deals, managed credit risk, and advised on capital strategies. My expertise spans both traditional and alternative financing, allowing me to bridge business needs with capital. I now seek roles with firms that value insight, deal flow, and growth-focused thinking.

Erannee is a Senior Manager at JY Sigma Business Consultancy (JBC) with 30+ years of experience in real estate and investments. She has held roles from Executive Assistant to Head of Commissions and Operations Manager. Since moving into sales in 2007, she’s built a trusted reputation for honesty, service, and performance. Erannee believes lasting success comes from sincere relationships and doing business with integrity.