Mobile app for commercial cleaning company

I am looking for a mobile app developer who can develop an app for a commercial cleaning company. The app must be designed for iOS devices and should include features that allow us to manage our employees. It is important that the design follows our existing branding guidelines. All applicants must be knowledgeable and experienced in mobile app development. Additionally, any app should should be able to interoperate with existing enterprise systems. The project requires a developer who can convey complicated ideas visually and can take a concept from ideation to production. The project must robust, secure, easy to use, and follow all applicable laws and regulations.