Sierra Leone's minister of education and chief innovation officer David Moinina Sengeh is a man of many talents. He's using mobile phone technology to improve daily life, he invented a way to make a prosthetic limb with a computer-assisted technique and he's a singer and rapper and a clothing designer, too. Sierra Leone's minister of education and chief innovation officer David Moinina Sengeh is a man of many talents. He's using mobile phone technology to improve daily life, he invented a way to make a prosthetic limb with a computer-assisted technique and he's a singer and rapper and a clothing designer, too. David Moinina Sengeh is not your typical education minister.