Hi! We, too, were looking for specialists for Salesforce implementation and found them through contacts of colleagues from related companies. Sometimes the best way is to consult with those who have already gone through a similar process. The most important thing is that the specialists are experienced and understand our business. If you need to, you can find additional resources here at this link

The best way to find them is through specialized forums or communities. Usually there you can find people with experience and references to help in this process. It is important to choose qualified professionals who fit our specific needs