Dr Helna is a Consultant Clinical/Radiation Oncologist and Head of the Oncology Department at Kenyatta University Teaching Research and Referral Hospital.

She is an Adjunct Lecturer at the University of Nairobi, Radiation Oncology program.

She is a member of various Ministry of Health technical working groups aimed at improving access to cancer care in Kenya.

Dr Helena is the first recipient of the Leadership Program of Women in Oncology by the City Cancer Challenge Foundation and ASCO. She serves in the International Education Steering Group at ASCO and is a member of the Public Policy Committee at ESMO.

She is the current KESHO secretary.