Currently job plugin modules are not dependency-injected (or "autowired"). They are instantiated by Quartz directly instead, because the module descriptor constructs the JobDetail bean this way:

JobDetail jobDetail = new JobDetail();
jobDetail.setGroup(getPluginKey());
jobDetail.setName(getKey());
jobDetail.setJobClass(getModuleClass());
JobDataMap jobDetailMap = new JobDataMap();
jobDetailMap.put("runOncePerCluster", String.valueOf(perClusterJob));
jobDetail.setJobDataMap(jobDetailMap);
return jobDetail;

Although I haven't tested it, it should be possible to construct a delegating job class and pass the autowired plugin Job to it via the JobDataMap. I think this is how the MethodInvokingJobDetailFactoryBean works in Spring.