Lucy Brady, a BCG partner and mother of three, says she was appointed partner while working part-time at the firm, which she has done for 10 out of 15 years.

WSJ: McKinsey Tries to Recruit Mothers Who Left the Fold

His business partner, an app developer who was working part-time on their San Francisco startup, had to devote more time to his other, full-time job.

WSJ: App Building, the Do-It-Yourself Way