A Locksmith
cobblerA person who mends or makes shoes is a Cobbler
Panama Canal
If you mean the keys to a business, then the management usually has insurance to cover the replacement cost of keys and locks.
They make keys, change locks, and that sort of thing.
Not much can be found on who William Scott-Mends is. There is no information available on William Scott-Mends or his life.
To identify, inventory, issue and receive keys correctly operating locks while maintaining records of keys and locks, key holders, and instructions to produce or dispose of keys. Effective Key control must monitor lost or stolen keys, coordinate lock replacements and collect appropriate fees associated with production and issue of keys. Most important, the effective key control plan will assure keys work as required and are issued and collected in a timely accountable manner. Additionally, security of keys and accurate records of keys and locks are necessary for effective control. The key players of the plan are the locksmith, key control personnel, and key holders. Critical to the success of the plan are the processes by which keys and locks are requested, keys issued, accounts managed and customer interactions managed.
About 4,000 years ago wooden locks and keys were invented.
Cobbler or Shoe Cobbler
locksmith or have new locks installed
A lock smith, or a Housing/Hardware store
Someone who makes and repairs locks is a locksmith; someone who makes hinges would be a blacksmith or forger. Sometimes one person will be both; today most hinges and locks are made in factories.
A shoemaker makes custom shoes and does repairs to good quality footwear.