Looking for help with branding and marketing

My business is currently going through a few changes and i'm looking for help on the brand and marketing side of things. My business is CBBS Ltd, an accountancy firm, and the changes we're going through are
1 - We are about to launch some new services - customer services and operations
2 - We are on the road to becoming a sustainable company

I'd like some help on creating a brand that stands out. It would be good if you had experience in doing something similar in the accountancy industry but not essential.