I'm not a big one for going "all out" for work functions. First off, you are paying for those ingredients from your personal funds, and, more importantly, I find people prefer easily recognizable foods, which is fine, and also makes things easier!
One option that would not be too expensive and would work for a "work" gathering: buy different flavored wraps (spinach, sun-dried tomato, etc) spread with cream cheese, a bit of sun dried tomato spread, then place over good deli turkey, decent cheese if you want, maybe some lettuce/spinach leaves, etc. Tightly roll up the wraps and then slice into 1 inch thick rounds, securing each with a toothpick. You could do different meats for different colored wraps. Bring signs to tell what everything is, and people will eat it up.
There is always the seven-layer dip with tortilla chip option. Or take grocery-packaged hummus and replate it with some precut store bought veggies and crackers.
If you want something fancier, please post back and I will give alternate ideas. I do have some, really!

Also, is hot OK, or cold only, since it is a work gathering and you may not be able to keep warm/reheat?