The "Order of the Engineer" is a fellowship of engineers who are trained in science and technology and dedicated to the practice, teaching or administration of their profession.
Initiation into the Order includes commitment to the "Obligation" and acceptance of a stainless steel ring to be worn on the little finger of the working hand. Only those who have met the high standards of professional engineering training or experience are invited to accept the Obligation, which is voluntarily received for life. This commitment is not a trivial act but is, rather, like the wedding of the engineer with his profession. The ring is worn as a visible symbol to attest to the wearer's calling and symbolizes the unity of the profession in its goal of benefiting mankind. The stainless steel from which the ring is made depicts the strength of the profession.
I just took the pledge at the last annual meeting (8 years after retiring from AIChE staff). Also received my PE 25 years ago (also in the latter half of my career). I see both of these as reinforcing my sense of being part of the profession. Both tend to remind me of the need to practice in an ethical way.