Laravel 5.1 Polymorphic relationship Or Regular Relationship -- need help

I have Three model in my code Company, User and Employee

User
 id
 name

Company
 id
 name

Employee
 employer_id // foreign key to id on company table
 employable_id
 employable_type

• User can have many companies as owner/director/president
• User Cannot have Any employee directly
• Company can have only one user as owner/director/president
• Company can have many employees
• Employee can have one employer which is company
• Employee can have many user or company as an employee -employer is always a company
• a company as an employer, can hire another company as an employee or a user as an employee...
• so company can have two relation with employee table that is as an employee itself and as an employer.
• user are not to allowed to employeed anybody directly
• user can hire employee through a company only ..

I am not able to figure out what kind of relationship i can use here so that i can have user and company as an employee but also company as an employer.

-- Edit I have the following table structures:

Employee Table ->
        employer_id' // Only company_id
        employee_person_id // user_id
        employee_company_id // Company_id as an employee
        employee_type // company or person
        name // name of company acting as employee or user full name
        email // email of company acting as employee or user email

        $table->foreign('employer_id')
            ->references('id')->on('companies')
            ->onDelete('cascade');

        $table->foreign('employee_person_id')
            ->references('id')->on('users')
            ->onDelete('cascade');

        $table->foreign('employee_company_id')
            ->references('id')->on('companies')
            ->onDelete('cascade');

My employee class has following methods

class Employee extends Model 
{
   public function employedBy()
   {
     return $this->belongsTo(\App\Models\Company::class, 'employer_id');
   }

   public function employedPerson()
   {
     return $this->belongsToMany(\App\Models\User::class,   'employee_person_id');
    }

   public function employedCompany()
   {
      return $this->belongsToMany(\App\Models\Company::class, 'employee_company_id');
    }
}

My Company has following methods

class Company extends Method
{
  public function employees()
  {
    return $this->hasMany(\App\Models\Employee::class, 'employer_id');
  }

  public function employers()
  {
    return $this->belongsToMany(\App\Models\Employee::class, 'employee_company_id');
  }
}

My User has following methods

class User extends Method
{
  public function companies()
  {
    return $this->hasMany(\App\Models\Company::class, 'user_id');
  }

  public function employers()
  {
    return $this->belongsToMany(\App\Models\Employee::class, 'employee_person_id');
  }
}

Ok now let me explain in steps:

1. Company wants to hire employee ( employee can be any other company or a person)
2. Company search employee by email
3. Searched company or person added to the employee table

--Also when i query for all the employees i want to have both employed users and employed company in collection, please suggest me the way to fetch list joining users and companies through employee table--

// I want to write something like this
$company->getEmployees()  = // to get detail list of employees and companies in one single collection