Collins senior commissioning editor Helena Nicholls is being promoted to editorial director, following Sam Richardson's departure at the end of November to join Hodder Education.
At the Simon &Schuster imprint, Michael Szczerban has been promoted to associate editor.
Sales growth of 5% at Penguin and 7% in education at Pearson.
Penguin said physical retail markets were tough offset by "strong publishing" and rapid growth in e-book sales, which had increased threefold year on year. It now has 16,500 e-books available.
In its professional education business, sales were up 17%. Pearson said: "Market conditions in our professional publishing business remain challenging but we are benefiting from good growth in digital sales."
Sales in Pearson's international education business were up 8%, which was driven by strong demand in developing markets for assessment services, as well as English language learning in China. However, Pearson said developed markets and school publishing remained soft. In North America, sales were up 5% thanks to higher education and digital.