Greetings,
As shared by Samvedan , you may have not been formally trained in House keeping during MBA. But certain areas such TQM, Kaizen and 5S would include housekeeping. The deliverable of HR remains in running the project from the strategic view and remain a think tank to these OD events.
You may be on the top of such programs knowing how to trouble shoot when an escalation crops . You do not run them, rather be a custodian to Admin to ensure the certification is completed. More importantly, House keeping might at certain times be connected to the safety and the well being of the employees, such as on a shop floor . That's the point where House Keeping would be a part of HR purview
Please do find the links with detailed discussions and document on the roles of the HR Department.
Resposiblities of the HR
HR Roles with House keeping mapped into the responsiblities
Regards,
(Cite Contribution)