I don’t know how he got so muscular to start with (lucky bastard), but if he’s brand new to weight-training, then any consistent routine should give him decent strength gains to start. In fact, strength is one of the quickest, most noticeable improvements when beginners start training on a regular basis.
A suggestion, done 3 days a week, alternating each workout…
Uber-Basic Workout Plan #214
Workout 1: Squat 4x8, lunge or step-up 4x8, romanian deadlift 4x8, “random ab crunching exercise” 3x12, “random ab rotating exercise” 3x12
Workout 2: Flat bench press 4x8, bent BB row or seated cable row 4x8, standing military or DB press 4x8, pull-up or front pulldown 4x8, “random biceps exercise” 3x12, “random triceps exercise” 3x12
Nothing ground-breaking here. Avoid failure on all sets. After 3 or 4 weeks, drop the reps, increase the weight, and maybe play around with the exercise choices and/or order.
To gain strength, the key will be high loads (meaning heavy weights), used for (obviously) low reps. The more sets performed, the more muscle will be built accordingly. So, 10x3 wil build more muscle than 3x3. But both will help to build strength. In fact, Chad Waterbury has his Strength-Focused Mesocycle, which might be worth looking into: