I want to apologize for the posters here who are not giving you the straight forward guidance you originally asked for in this thread. Hopefully this helps.
Not sure how concise of a step by step process you're looking for, but I've read this to be pretty straight forward for Jhana absorption. http://www.buddhanet.net/pdf_file/know-see.pdf
Its a free pdf booklet authored by Venerable Pa-Auk Sayadaw from the Forest Monastery based on the Visuddhimagga view of Jhana.
Also he had a student who wrote Focused and Fearless, which seems to be one of the best straight forward books on the subject. It will soon make it to my night stand for reading.
https://www.amazon.com/Focused-Fearless/dp/0861715608/ref=cm_cr_arp_d_rvw_txt?ie=UTF8
If I were to outline a (very) basic routine it would consist of:
Morning ritual of:
Concentration/Jhana meditation
Physical Exercise and stretching to open the channels and the other obvious benefits of physical exercise
Through-out the work day:
Stay in the moment, and treat your work as play
(Qi Gong, stretching, staying active if possible)
(Concentration can be improved when staying on task at work)
After work:
Back to the Jhana meditation and other meditations as you see fit
Obviously, a lot is open to interpretation and is meant for your own intuitive spin on the exact techniques. But generally, meditate when not at work, be in the moment at work (always), and don't forget about your physical body as well.