"I'm not questioning your judgement. I'm saying you're flat wrong!"
Doctor Hobbs earned her medical degree at the Tagore Medical School in Bangalore, Indian Consortium on Earth before doing advanced medical training at the Institute Pasteur in Paris. She has authored several papers on the Human immune system published in the EMA Journal.
During her time on B5, Dr. Hobbs found herself bouncing from one Medlab to another, never really finding herself a niche, though it left her with a lot of generalist medical experience. She also butted heads with Doctor Franklin on a few occasions but still had great respect for him. In 2260, during Dr. Franklin's brief leave of absence she became the acting Chief Medical Officer.  She, along with Garibaldi, played a key role in getting Dr. Franklin to admit that he had a problem with Stims.
In 2262, when Dr. Stephen Franklin left B5 to replace Dr. Benjamin Kyle as head of Xenobiological Research at Earthdome, he handpicked Lillian to take his place as B5's CMO, because of her wide array of medical experience he felt that she would be perfect for the job, much to her surprise.
- Babylon 5