Data Doctor, Analytics & Revenue Services company logo, letterhead design

I'm in South Africa, I've just started a business that will deal mainly with data and Analytics plus offer revenue enhancing services in the Government space mainly. I desparatley need help to (1) put together a letter head reflecting these services and (2) I need a clean and very memorable logo for this business... There are two businesses I am starting up but this will be my 1st priority but they need everything on my letterhead for the 1st 2 projects on data cleansing, analytics and revenue enhancement strategies