I need a logo designer

We started as LRG Electrical and the logo and design is now well known and the livery is on alot of vans already. We have since branched out into Plumbing & Heating and Construction. We are looking at a group logo that incorporates all parts of the business into one. We have had something sent over to us but wondered if anyone could help sharpen it all up or have any other ideas. The only stipulation is that the yellow rings remain.