I switched the mode from Request to Timer, and now the job runs (and Completes and succeeds) every 10 seconds.

I'm so glad this isn't sending the 250 text messages to production users every time. Hahhahha!

public MessageEngine()
        {
        }

        public MessageEngine(ScheduleHistoryItem item) : base()
        {
            this.ScheduleHistoryItem = item;
        }

        public override void DoWork()
        {
            try
            {
                this.Progressing();
                // doing things here
                this.ScheduleHistoryItem.Succeeded = true;
                this.ScheduleHistoryItem.NextStart = System.DateTime.Now.AddDays(7); // have tried with and without this
                this.ScheduleHistoryItem.AddLogNote("Y U No Workie?");
                this.Completed();

and then close the try/catch and exit.

am I missing something?