Albert Okumagba, former Managing Director of BGL Group, was buried on Friday.
Okumagba, 56, was laid to rest in Warri, Delta State capital.
The Unity Schools Old Students Association (USOSA) expressed sadness over his death.
Aisha Muhammed-Oyebode, the Board of Trustees Chairman, in a statement eulogized the body’s pioneer President-General.
She recalled how the late capital market operator devoted his time and resources to the network of alumni.
The association comprises graduates of the 104 Federal Government Colleges in Nigeria (Unity Schools).
Muhammed-Oyebode said Okumagba’s passion for education and unity of Nigeria knew no bounds.
She revealed that he spearheaded “an informal coming together of a few former students of various unity schools, and turned it into the formidable network of leaders that it is today”.
“The Unity Schools, the country, the education sector, will no doubt miss him. USOSA owes him a debt of gratitude, which can be offset if his legacy is safeguarded,” Muhammed-Oyebode wrote.
The chairman added that Okumagba was a de-tribalised nation builder who worked to leave his mark.
Albert Okumagba buried, colleagues mourn
