You can only grow so far from within, and besides, bringing in outside, fresh faces is mandatory to controlled growth and fresh, new ideas. The person for these new positions has to be very unique. Please understand that this does not absolve you from training them. That would be too much to ask, and impossible. In fact, it is an injustice to you and the company to not invest in the right way in this new hire.
Nothing comes without a price, that if done right, is well worth it.
Every hire coming in under these circumstances should have a well thought out training and orientation plan. The mentor should be clearly aware of exactly what the expectations are, and what timeframes they must happen in to be effective. The worst part of ANY new job is the initial two weeks, which if left unclear, are unbearably boring. These two weeks set the tone for all future success. It s like a first impression.