Need a professional application to manage projects and tasks

General information for the business: Market research
Kind of development: New program from scratch
Description of every module: We create market research.
we need to plan our workload by project, by person, and of course by date.
we want to have our own project management system, customized to our precise needs.
Our projects have the exact same structure. each section of the project can be assigned to one or several of the persons in the group.
Description of requirements/functionality: Create the planning and the workload for each project, person
Have the general vision of the workload
Being able to extract day by day, week by week, month by month ... each workload
OS requirements: Windows
Extra notes: Being creative and provide suggestion to gain efficiency