O’Brien is a microfinance expert with more than 15 years’ experience in the microfinance sector in Zambia. He has risen through the ranks from being a Credit Officer at FINCA Zambia in 2003, Branch Manager at Micro Bankers Trust, Operations Manager at Agora Microfinance Zambia (for close to 10 years) and now CEO at UMINO Community Loans Services. He joined UMINO Community Loans Services in 2019 when he took over from the founder Mr. Maurice Kraemer. Furthermore, he has been instrumental in strengthening internal controls, business re-engineering and the expansion program.

O’Brien is a holder of a Master of Business Administration from the University of Zambia, a Bachelor of Science degree in Marketing from the University of Lusaka and a Diploma in Marketing from Evelyn Hone College.