Which prepositions can be used with "competence"?

Specificially, which of the following examples are valid/legal:

• I have competence on computers
• I have competence with computers
• I have competence as a programmer
• Our company has competence in programming
• Our company has competence on programming
• Our company has competence with programming and cooking
• Our company has competence within the fields of programming and cooking
• Our company has several employees with competence with programming
• Our company has several employees with programming competence