@Entity
@Table(name="outreach_queues")
public class Queue implements Serializable
{
    @ManyToMany(fetch=FetchType.LAZY, cascade={CascadeType.ALL})
    @JoinTable(
        name="outreach_queues_employer",
        joinColumns=@JoinColumn(name="queueId", referencedColumnName="queueId"),
        inverseJoinColumns=@JoinColumn(name="employerId", referencedColumnName="employerId")
    )
    public Set<Employer> getEmployers() {...}

    ...
}

@Entity
@Table(name="employer")
public class Employer implements Serializable
{
    @ManyToMany(mappedBy="employers", fetch=FetchType.LAZY)
    public List<Queue> getQueues() {...}

    ...
}

CREATE TABLE `outreach_queues_employer` (
  `queueemployerId` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  `queueId` BIGINT UNSIGNED NOT NULL,
  `employerId` BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY (`queueemployerId`),
  CONSTRAINT `FK_employerId` FOREIGN KEY `FK_employerId` (`employerId`)
    REFERENCES `employer` (`employerId`)
    ON DELETE CASCADE
    ON UPDATE CASCADE,
  CONSTRAINT `FK_queueId` FOREIGN KEY `FK_queueId` (`queueId`)
    REFERENCES `outreach_queues` (`queueId`)
    ON DELETE CASCADE
    ON UPDATE CASCADE
);