The Sr. Accountant, Costing at Enphase Energy is responsible for all inventory and cost accounting, including inventory cost analysis, monthly financial close, maintaining a strong internal control environment, and ensuring the accuracy of physical inventory. This role requires excellent analytical skills, ERP system proficiency (Oracle or SAP preferred), advanced Excel skills, and experience in inventory management. Key responsibilities include ensuring the timeliness and accuracy of month-end close activities, preparing and analyzing inventory reserves and adjustments, collaborating with cross-functional teams on process and system updates, participating in year-end physical inventory and cycle counts, and providing ad-hoc reporting and analytical support. The ideal candidate will possess a CMA/CA/CPA qualification (min. 4 years experience) or an MBA (min. 6 years experience) with a strong foundation in supply chain operations, inventory accounting, and procure-to-pay processes. A deep understanding of US GAAP and cost accounting principles is essential.