Kweilin has broad experience designing and implementing global performance transformations—for example, redesigning operating models and increasing operational efficiency and effectiveness. She improves customer journeys by applying digital, analytics, and process-redesign principles.

In addition to her client work, Kweilin is a member of the McKinsey Global Institute Council, which provides expert input for MGI's research on global economic, business, and technology trends. She also instigated and co-led McKinsey's Power of Parity work on gender equality and improving the lives of women around the world. Other areas of expertise include women in STEM, accelerating gender equality through investment strategies, women in leadership, and the future of work. She is a frequent speaker at global conferences and also works directly with global philanthropies, multilateral organizations, and companies on how to move toward gender equality. Growing up, Kweilin spent a number of years in China, Ecuador, France, and Japan, living with local families and learning the local languages.