How is Role and Seniority defined?

Role

Standardization of a role within a company: 

ceo
communications
consulting
customer_service
education
engineering
finance
founder
health_professional
human_resources
information_technology
legal
marketing
operations
owner
president
product
public_relations
real_estate
recruiting
research
sales

 

Seniority

Standardization of a seniority within a company:​

executive
director 
manager