Pornchanun received a B. Eng. degree in computer engineering from the King Mongkut's Institute of Technology Thonburi in 1994 prior to furthering her education with an M.B.A. degree in finance from the University of Oklahoma, Norman, USA in 1997. She began her career at Watters & Watters Inc., a textile company located in the US, as an assistant financial controller before returning to Thailand.

Prior to joining Sage Capital, Pornchanun worked as manager at Baker Tilly Thailand Limited (formerly named Ferrier Hodgson) since 1998. She completed various financial advisory assignments, most of which being financial restructuring services, both under and out of the Bankruptcy Court of Thailand, for a number of industries including shipping, construction, steel, pulp & paper manufacturing, retail and coal mining. The tasks ranged from due diligence, industry analysis, preparation of financial projection and cash monitoring to restructuring plan preparation and implementation, proof of debts, equity and debenture issuance and negotiation amongst domestic and overseas financial creditors. In addition, Pornchanun completed a fund raising assignment for a sanitaryware company and a sale of the property transferred from a debtor to the creditors according to the restructuring plan. She was also actively involved in a business restructuring of a group of companies in property development business.

Since joining Sage Capital in 2005, Pornchanun has been actively involved in an establishment of a joint venture between Thai governmental entity and private maritime business operators with a purpose to develop it into national maritime fleet. She is also an active team member in the financial restructurings of a construction company and a concrete manufacturer in Thailand. Most recently, Pornchanun acted as financial advisor to G Steel Plc., Thailand's major hot-rolled coil producer listed on the SET, on its entry into strategic business alliance with NSM, another listed hot-rolled coil producer, including its US$ 178 million investment in NSM's secured claims, converted and/or convertible into equity.