Wordpress custom software

We have a website prepared by Wordpress. Website belongs to an Association, which has lot member companies. We need a custom software for this web-site, you may find the specifications below. - Member companies will have company profile pages at backend, all the contact (company logo, country, city, address, phone & fax number, e-mail, social media page links etc.) and staff info (name, surname, e-mail, phone, social media profile page links, etc.) will be stored here. This profile page will be accessible through frontend. - There will be 3 types of users, 1) Assocation admin 2) Company admin 3) Company user. Company users will be able to modify the company profile page. Company admins will be able to create company users. - Website has a Join page. We need a customization on this page, new applicant companies should enter their located city and if there is no member company at that city page should direct to application form page.