As a Purchasing manager you will be exposed to many sectors of the business. Engineering, finance, SIOP, shipping and receiving. This will provide you with a well rounded under standing of the integral parts of your organization. You will also learn to negotiate legal contracts to protect your company from lawsuits and provide the best pricing for the products you manage. Additionally, you will hopefully learn to manage a wide range of personalities for your team. Many other things you will learn also.
Well the purchasing manager role is very dynamic. You can really shine or you can really not. You have the ability to impact the gross margin and bottom line for the company you are working for. Perhaps in the the food and beverage area of a hotel especially. There are also a lot of dotted lines between the purchasing manager and all the other managers of departments for your company (especially the director of finance or controller) in my case the hotel.
As Purchasing managers overseeing the work of buyers and purchasing agents and typically handle more complex procurement task.