IT service provider seeks project management software for a real estate company

We are an IT service provider based in northern Germany and are looking for project management software for an international real estate company (corporate real estate management division).

The software should meet the following requirements:

• Capacity planning
• Performance recording
• Project controlling
• Project reporting
• Project billing
• Master data management (customers, suppliers)
• Contract management
• Document management
• If you offer a complete system, is it possible to purchase individual modules?
• Multi-client capable
• AZURE and AWS are preferred cloud hosting solutions (in a European data center)
• Is it possible to classify data differently (internal data, confidential data, secret) and encrypt data?
• API capability, i.e., flexible interface
• Single sign-on with the openID solution, customizable
• Can the solution be used across platforms, on mobile devices, and internationally?
• Accessible as a web browser-based solution in-house or via a European data center (both are mandatory criteria)

150 software workstations are planned. Work will be carried out in an MS Windows system environment