O'seun Ogunseitan is a Nigerian journalist known for reporting on science, technology, agriculture, and environmental issues. He studied Zoology at the University of Ibadan and began his journalism career in 1984 when he joined The Guardian newspaper in Nigeria. 

During his time at The Guardian, he became the first Science Editor, covering science, technology, and environmental topics. His reporting focused on explaining scientific developments and environmental problems affecting Nigeria. 

Later in his career, he worked with The Nation newspaper as a Science and Technology Editor, where he continued writing about technological innovations and scientific developments in Nigeria. 

Ogunseitan has written numerous reports on science and environmental issues in Nigeria. His writings often focus on:

Scientific research and discoveries

Environmental problems such as pollution

Agricultural science and farming innovations

Apart from journalism, Ogunseitan has contributed to knowledge development in science communication. Some of his notable works include:

Co-author of the book “The Making of the Nigerian Flagship: A Story of The Guardian, Lagos.” 

Development of Nigeria’s first free e-learning tutorial software (Fashola.exe) designed to help secondary school students practice examination questions. 

Digitizing and archiving Nigerian newspapers on Blu-ray discs and flash drives, preserving media history. 

Technology development and digital innovation in Nigeria

While working at The Guardian, he reported important stories including environmental pollution and toxic waste issues, helping to bring attention to environmental safety in Nigeria.

He also contributed articles to international publications such as New Internationalist, where he discussed science and development issues in Africa.