You use both "organisational coaching" and "executive coaching " to describe your programs, which is correct?

Both are correct! We are gradually making a shift in the wording to "organisational coaching" as it more accurately describes what we teach (it’s not just executives that we coach, but people at all levels in organisations!) so we find organisational coaching to be a more appropriate descriptor for what we teach and offer. Because the term is relatively new in our materials (January 2012) it is still used interchangeably with executive coaching.