Examples:

• She had cut her teeth at local radio stations, but made her name on a reality show.
• Actors who cut their teeth on low-budget films
• Both reporters cut their journalistic teeth on the same provincial newspaper.
• He cut his teeth at places like Claridges.
• The entrepreneurial owner cut his teeth on a Schweizer 300 which he still owns.
• Rahul and Rohan both cut their teeth on the old hot-metal newspaper production process.