The phrase "senior member" refers to someone who has been involved in a group or organization for a long time and holds a higher position or has more experience compared to others. Full definition
Yes, a number of senior members of our conference announced recently they would not be running for re-election. (nystateofpolitics.com)
As a result, these professors are less likely to provide practical insights and will approach their instruction more as members of the legal academy than as senior members of the bar. (legalproblemsolving.org)
Unfortunately most senior members of the profession don't seem to be able to see this as the problem that it is. (slaw.ca)