Tessa O'Callahan

Tessa O'Callahan is a seasoned accounting professional currently serving as the Global Intercompany Accounting Manager at Diamond Foundry since October 2023. Prior to this role, Tessa worked as a Financial Accounting Supervisor at BRIGHTMARK and as an Accounting Manager at Jerry. Tessa's foundation in auditing was built during a tenure at KPMG US, where responsibilities included roles as Senior Associate Auditor and Audit Associate. Earlier experience includes serving as an Accounting Administrative Assistant at Hines, an Administrative Assistant at Oregon State University, and a Sustainability Intern at the Corvallis Environmental Center. Tessa's career began with a management position at Pump It Up. Tessa holds a Certificate of Advanced Accounting Proficiency from Santa Clara University and a degree in Agricultural Business Management with a focus on Applied Economics from Oregon State University.