Go to the FileMaker web site (Database Software | FileMaker), click on the Support button and pull down to Consultants. They will show all the consultants by geographic area and their certifications. If you're in the Dallas, Texas area, I can help you.
If you are in the UK, we have been developing in FileMaker since 1992, nearly 20 years.
We have integrated many FileMaker systems from warehouse and inventory management, to wireless devices communicating with FileMaker for field service engineers out on the road, allowing invoicing within 10 minutes of a job being completed.
We have a generic application, to cover all the fundamental Business Management. It is set at a low price point to enable the customer to have bespoke modifications, if required, so that their new application does not break the bank: