Old Speaker Page
The first thing I did was look at the original site and define any issues or any improvements. The original design displays only the company logo, Im guessing that this is done because it was thought that the company that the speaker belongs to is the biggest draw for attendees so promoting the company over the person was the way to go, I feel that just displaying a logo is impersonal and doesn’t immediately say speaker.
Original Speaker Page

The original speaker page consists of a grid of logos with the company name and job title below
Original Speaker Modal

The speaker photo is revealed in the speaker modal
Speaker Card Vs Sponsor Card
The speakers and sponsors have very similar cards, The speaker card resembles a sponsor card as they are both logo's in a white box.

Logos Sizes
There seems to be quite a big difference in the size of some logo's compared to other logo's, If the logo footprint is equal on all sides it will take the maximum amount of room possible, however if the logo's footprint is a rectangle wont be able to .
Logo sizes are not even

I think the logo frame being a sqaure favours logos that have a square footprint.