assuming your talking about is eloquent relationship something like this !

// get all the contractors with skiil levels
Contractor::with('skills.skill','skills.level')->get();
/*
	contractor
		name // john doe
		address // some place 
		skills
			skill_id // 1
			contractor_id // 1
			skill
				title // php
			level
				title // senior
*/

Class Contractor extends Model {
	public function skills()
	{
		return $this->hasMany('ContractorSkillLevel');
	}
}

Class ContractorSkillLevel extends Model {
	public function skill()
	{
		// this is assuming you already have the Skill Module
		return $this->belongsTo('Skill');
	}
	public function level()
	{
		// this is assuming you already have the Level Module
		return $this->belongsTo('Level');
	}
}