According to a report by YEN published on Monday, July 6, 2026, Osei officially assumed the acting role on July 1, 2026, succeeding Baïdessou Soukolgué of Chad.
Before her appointment, she served as a member of EISA's board, where she contributed to the institute's governance and strategic direction.
Reacting to the appointment in a post on X, Osei expressed gratitude for the opportunity, saying she was honoured to lead the institution in its new phase.
She also stated that she looks forward to working closely with the board, partners, and staff to strengthen EISA's legacy and advance its mission of promoting democratic governance across Africa.
EISA also welcomed her appointment, describing Osei as a leader with extensive governance, institutional, and electoral experience. The organisation said it remains committed to expanding its impact under her leadership.
Headquartered in Johannesburg, South Africa, and Abidjan, Côte d'Ivoire, EISA has played a key role in supporting democratic transitions, election observation, conflict monitoring, mediation, and peacebuilding initiatives throughout Africa.
A lawyer by profession, Osei currently serves as a United Nations International Elections Commissioner. She was born on February 1, 1969, in Nigeria, attended Ghana National College, and earned law degrees from the University of Ghana and Queen's University in Canada, in addition to a Master's in Business Leadership from the University of South Africa.
Osei became Ghana's first female EC Chair but was removed from office in June 2018 following a committee investigation into allegations of misconduct.
Since then, she has served in several international advisory roles, including with the United Nations in Afghanistan, while continuing to advocate for credible elections despite previously recounting the personal challenges and threats her family endured during her tenure.