As a Contract Manager, you will need to master following:

• adhere to organisational code of ethics
• apply certification and payment procedures
• develop performance orientation in public administration
• implement procurement of innovation
• implement risk management in procurement
• implement sustainable procurement
• maintain relationship with suppliers
• manage procurement planning
• negotiate improvement with suppliers
• procurement lifecycle
• supplier management

More generally, a contract manager is also versed in:

• procurement legislation
• adapt to changing situations
• address problems critically
• adhere to organisational guidelines
• communication principles
• cooperate with colleagues
• keep up-to-date with regulations
• manage contract disputes
• manage contracts
• manage relationships with stakeholders
• morality
• negotiate buying conditions
• negotiate supplier arrangements
• organisational structure
• perform contract reporting and evaluation
• project management principles
• teamwork principles
• think analytically
• use communication techniques

It also helps to know the following:

• e-procurement
• use e-procurement