Design my Powerpoint slides

I have a business powerpoint presentation made on a blank template and needs to be snazzed up and jazzed up to look professional and easy to read.

There is small amount of data which may need to be graphically represented but nothing complicated.

The design I want will be minimalist and modern not cheesy hand shakes or revolving globes.

MUST HAVE PREVIOUS CORPORATE POWERPOINT EXPERIENCE AND EXAMPLES TO SHOW.