He should be able to do both. If he works out at a gym, he can begin each workout with some cardio and then transition to weights. I typically run outside (the machines drive me insane), come back to the gym, and do some circuit training on the free weights for another 1/2 hour or so. I also look for reasons to get off my ass and do things. When I need to go downtown, I walk instead of taking the street car. When I get a sandwich at work, I typically walk an extra mile to get to the store. Small things like that add up really quickly.
Massive calorie cutting is difficult and, unless the few calories you do ingest are very high quality (i.e. no empty sugar calories) and are relatively spaced out throughout the day, you'll find yourself really dragging as the day progresses. So be careful.
On April 11, I weighed almost 230 lbs (I'm 6 ft tall). I started running a few miles a day, following by the circuit training. My total workout was about an hour when I began. Mon-Fri, my breakfasts were a couple of apples and a cup of low fat yogurt spaced out over a couple of hours. Lunch was a six inch Subway sandwich.
I was a bit more relaxed for dinner because we like to have a sit-down dinner with our kids. But my wife is a dietitian and was more than willing to change our menu to something that had a relatively high protein/carb ratio and was relatively low fat. Take your time with larger meals. Drinking lots of water helps control portion size. If I ever really get hungry between meals, a cup of skim milk and a small handful of walnuts and almonds will almost always tide me over until the next meal. I found that if my little snack didn't have some fats or protein, I would be hungry 30 minutes later.
This isn't a starvation diet by any means. But it does offer me a very set routine which isn't hard to stick to. For me, creating that sort of routine was essential (and still is).
On weekends I would relax a bit as well. We could occasionally eat out on Saturday night (the only night I allowed myself to consume any alcohol for a few months).
It's mid September now and I am in the mid-high 180s and I'm now in maintenance mode. I do cardio for about 90 minutes a day without really thinking about it (mostly swimming but occasionally cycling). I developed a nasty shin splint so my running/circuit training has taken a hit. I still try to do some strength training a couple of times a week but that probably won't start up full time until I can run again.
Best of all, as long as I don't get too crazy, I can have a few IPAs on non-work nights without any worries.