The following is taken from David’s interview with Rachel Pryor in 10 Super Coaches.

Would you advise coaches to pursue certification?

Yes, yes and yes. There are just too many people who set themselves up as coaches – it is getting increasingly clear that those with certifications stand out.

If so, at what stage in their practice, and through which accrediting body?

Certification requires a certain number of client hours, so that might determine how soon you can become certified. I went straight for the highest certification there is (CCMC with CoachInc, and CMC with the International Coach Federation) because I had more than enough client hours (2500+). I certified after 3 years coaching.