Hi! I can't advise on Alexander teachers in Dublin but had sessions for about a year in London. Potted version.....Alexander was a professional actor who at one stage of his career developed difficulties with voice projection which lost him roles and work. Undaunted he set about investigating what was at the root of his difficulty and discovered (through close observations of himself in a mirror as he delivered his lines) that he tended to pull down his chin and retract his neck - involuntary accompanyments to the anxiety of being heard.
From this initial discovery he continued to explore muscular tensions in everyday activities, developing a manipulative technique to "retrain" the body to let go of these habitual responses.
A friend who "taught" at the Royal Colleage of Music (many musicians use Alexander to counteract the habitual stresses of playing e.g. cello which can lead to repetitive-strain injury) describes his job as "teaching people how to sit down and stand up".
Alexander is a very gentle non-intrusive technique which like Tai-Chi (which another poster mentions) involves mind and body. I found it useful in maintaining back health earlier in my life before the work I did (sculpture-making in steel, lifting heavy weights around all day and lying on a concrete floor welding from beneath!!!) required moving on to remedial work (osteopathy).
Alexander "lessons" are always individual one-to-ones so I'm not sure what a "corporate" approach would entail. Everyone uses her/his body differently; everyone develops muscular routines and characteristic laziness of posture etc. so the "teaching" must be addressed to that one unique body and entails consciously-executed changes in posture, movement, lifestyle etc.
This URL (Society of Teachers of Alexander Technique) might be helpful in tracing a Dublin teacher.
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It would be nice to know how you get on with it.