The actual employment history section of a functional resume is typically brief with a simple list of positions held, company names and employment dates at the bottom of page one or on page two to de-emphasize their importance. (monster.com)
On the second page of your skills - based / functional CV, you can include a short employment history section. (cv-library.co.uk)
But if you write the employment history section skillfully, you can include enough about your skills that you don't need a separate section. (sciencemag.org)