I'm working with a SQL database for a Skills Matrix application and I need a query to return a list of employees that are qualified for a given position. Here's a brief overview of the relevant relationships:

* Employee has many skills through
qualifications
* Position has many
skills through requirements

Is there a efficient way to return a list of employees that have the qualifications to meet a certain position's requirements?

**EDIT**

```
employees
- id
- name

positions
- id
- title

skills
- id
- name

requirements
- position_id
- skill_id

qualifications
- employee_id
- skill_id

```