I do not know what type of butcher Peter Goehle and Johann Bernard Petermann were. That is, I do not know if they worked in slaughter houses or butcher stores. Peter Goehle was described at one point as a "provisions butcher", but that really doesn't clarify the situation much.

They both lived near the docks so they may have been involved with dressing of meat for export.

Harper's Weekly, September, 1877

The exportation of dressed meat and live stock from America to Europe has lately grown into an extensive business. Less than two years ago the experiment was first tried of placing the beef and mutton of this country in the markets of Europe, and after much doubt and opposition a New York firm succeeded in sending a cargo of this perishable freight to England and landing it is such good condition that it readily sold, realizing a handsome profit.

During the eighteen months from October, 1875 until March, 1877, the dressed meat sent from new York amounted to 29,604,670 pounds.

The meat sent is invariably the finest Western corn-fed cattle, which are brought alive to this city, and killed just before shipment.

Harper's Weekly July 7, 1877