Substantial training and experience is needed in a customer service environment. This enables the customer care representative handle the queries of their customers in a professional way.

According to their website, it requires access to $3 Million and substantial resturaunt experience.

more substantial, most substantial

You don't need a substantial answer to this question.

with revenues of over $35 billion and more than 200,000 associates. Although lacking in experience in the food and drug business, Johnston had substantial marketing experience