I need help on listing credits in my art history book. [View all]

My editor is my daughter, who is knowledgeable about art and editing (she did my first art book).

But I needed to put my text into googledocs, so I hired an IT guy recommended by a professor at my grad school. He knows very little about art but is my tech support, big time! He also puts together my video presentations (slideshows) of art backed by music.

My question is how do I credit her and how do I credit him? He has become more essential to me technically and I want to give him top credits (which he very much wants as he is young and just starting out).

What is the appropriate way for authors to list these invaluable people? Is there a title such as "Technical Editor"? I want to give him a warmly appreciative mention, as I know he aspires to go beyond just IT technician and I want to help him in his career.