〜ともなると／〜ともなれば

Meaning

Indicates that upon reaching a special stage or situation different from the usual, such a state naturally follows.

Examples

一流のプロ選手ともなると、練習の厳しさも並大抵ではない。 When you become a top professional athlete, the rigor of training is extraordinary.
これだけ大きなプロジェクトの責任者ともなれば、そのプレッシャーは計り知れない。 As the person in charge of such a large project, the pressure is immeasurable.