Similarly, officers of an organization have their titles capitalized in internal documents. You may be the treasurer of your club, but in the minutes of club meetings, you'll be referred to as "the Treasurer": The Treasurer's report was accepted by unanimous vote.
Should position titles be capitalized?
To summarize the capitalization of job titles, you should always capitalize the job title when it comes immediately before the person's name, in a formal context, in a direct address, in a resume heading, or as part of a signature line.
Do you capitalize Secretary of Treasury?
When titles stand alone without names, they aren't capitalized: ... Some style manuals stipulate that prestigious titles—such as President of the United States, Secretary of State, or Senator—should always be capitalized even when they stand alone.