I'm not a 9-5 er, more like a 7:30-4 er. I train when I get off work. Run or bike right after work and swim after 7 when the lanes open up. It eats my whole evening on most days. We don't have kids, so I have enough time to devote to it. When I was IM training, my life was consumed with it. It was like having a full time job and a part time job. I'd devote entire weekends to training, and would swim or run before work, and do the other sport after work (bike or run). It was not easy, but I managed. Not having kids and having a DH who also trains definitely helps!!!
Now I'm just a slacker who hardly trains at all.