First off - your hair looks great!! I would consider you completely professional with hair like that. I do get what you're saying though - seems like curly hair is more unkempt than straight, and thus more unprofessional. This is why I straightened my hair at recent high-profile interviews I had, I am somewhat ashamed to admit. But I knew my straight (albeit not perfectly straight) hair was more predictable than my curly hair. Now I have the dilemma of what do I do on my first day at the job this summer? haha.

So (1): products. I am not a product junkie by nature, but my bathroom has been slowly filling up with them! Why? Because I have realized it really helps my hair to rotate among products, and because there may always be something out there that your hair responds to better, and you don't know until you try. So... you don't have to try everything, but I would recommend trying a few things in each category (low-poo, conditioners, curl enhancers, gels).

(2) gel. The best gel in my opinion? Biosilk Rock Hard Gelee. The best hold of any I've found, and you don't have to use a lot. And it's not as sticky as some of the cheaper ones.

(3) protein. If you have fine / medium hair, you may want to give protein treatments a shot. A great one is IAgirl's recipe, link below. I think I am becoming a salesperson for this recipe, haha! But I love it! I do it every 1-2 weeks. If your hair likes protein, it will help it hold onto its curl.
PT recipe - as promised

(4) coconut oil. Ok, so I'm brand new at this one. I just did my first coconut oil treatment last night (just smeared some all through my dry hair at the end of the day, and then washed it out 2 hours later before going to bed). I am sold!! I would not describe my hair as shiny, but today it is shiny!! And zero frizz!! I think it might be worth a try if you'd like.

(5) styles. I like the style of half-pulled-up with a barrette on people with your curl pattern (which is very similar to mine). So, you could dry your hair down like that, and then clip the top half back in a barrette. Or, another thing I do often is pull up some strands on the side of my face (either one or both sides) and clip them back with a small barrette or bobby pin.

Hope that helps. Overall though, I think your hair looks great as is!