A person who works in a manufacturing plant is commonly referred to as a "manufacturing worker" or "factory worker." Depending on their specific role, they may also be called an operator, assembler, technician, or machinist. Their responsibilities can vary widely, ranging from operating machinery to assembling products.
Assuming you mean ironing as in laundry, that would be either a presser or a laundress.
A miller grinds wheat into flour.
Spic is a racist spanish term. Spic means the n word ending in er. If you call a spanish person a spic it means they are low self worth and are dirty. The racist term also means suspicious person in custody.
If your question is "What do you call someone who uses the products made by industry?", you call him a consumer.
anoid
A child minder, nanny or perhaps a governess.
Tech Person
a slave
Employee
A person who works underwater and studies undersea plant life is called a marine botanist or a marine phycologist. They specialize in researching the plant life found in oceans, seas, and other underwater habitats.
someone who works for a business
A mathematician
hydrologist
moofer
A Chronogist
An astronomer.
An employee.