Another key component to lowering your blood pressure is to lower stress.
Work less if possible, extra hours mean higher stress and less time to work out or relax.
And be sure that you leave work stress at work when the work day is over.
Take up meditation or yoga, preferably to ambient or similar music.
Both of these components bring down stress on their own, but listening to certain types of music have been shown to lower stress even further.
The deep breathing required for meditation and yoga help to build oxygen in the blood, which becomes available to your organs with less effort by the heart.