As with any discipline worth its salt, Marketing will claim that it should be involved in every stage of the product lifecycle. From what the product will be, right through to how it should be sold.
In Professional Services, one of the great challenges is that this process is often all wrapped up in the one individual. The Professional needs to consider their product right through the lifecycle.
David Kendrick of UHY in the article below makes a number of interesting points not least that it is crucial that you build your sector specialism, but also that you had better be sure it is an interesting, fast growing sector.