Company Logo Design

My company has launched a new business called "Newstart Training" which is aiming to start trading immediately. I need a fresh, professional looking logo designed quickly and with minimal requirements for revision. The company delivers high level training courses to large, corporate clients and government organisations and therefore needs to look quite crisp and leave a good impression. I am looking for the company to use key colours of white, black and green with potentially a little blue. The logo should be easy to replicate on office stationary, and key documents. I will need the final files delivered in a range of formats that I can place on shirts, letterheads, and on our website which is about to be designed. Other than these parameters, I am open to any design ideas. I am looking for some real variety in the first submission so that I can pick a design for revision and amendment. I will not be available for chatting via Skype or anything similar, so please make sure before you apply that you have a good concept in your head that will not need a lot of further input from me as we are flat out at this point.