These annual awards recognise individuals, teams and initiatives and highlight excellence in how trade bodies serve their members and clients.
CIEH Chief Executive Anne Godfrey was awarded the Best Leadership of an Association.
The judges said: "All the nominees were impressive leaders for their associations and sectors but Anne's submission was exceptional. The level of transformation that she has led across every facet of the organisation is incredible. There was clearly a huge challenge in taking this role and, within a short amount of time, Anne has transformed the organisation."
CIEH also received the silver award for the Overall Best Association (over 1,000 members).
CEO Anne Godfrey said: "After our success earlier this year at the MemCom Awards, I was delighted to see that the hard work of our staff and volunteers has once again been recognised at the Association Excellence Awards."