元素列表的Django模型集

class Skill(models.Model):
    name = models.CharField(max_length=60)

class Competency(models.Model):
    skill = models.ForeignKey(Skill, null=True, on_delete=CASCADE)

class Employee(AbstractUser):
    competencies = models.ManyToManyField(Competency, blank=True, related_name='employees')

从一个特定的技能,我想得到一个有能力的员工与该技能的查询。

skill = Skill.objects.get(pk=id)
competencies = skill.competency_set.all()

考虑到“能力”包含许多元素,我如何才能创建一个员工查询集?