Speaking of their new fragrance, Joyful, the Australian model said: "ESCADA, particulary the new fragrance, has a lot of synergy with my personal outlook."
She continued: "It encourages positivity and confidence to see the bright side of life."
Posting an image of herself with a bright bloom of flowers, Miranda announced her new job on her Instagram page.
The brunette beauty captioned the image: "International Day of Happiness spent with @escadaofficial Joyful #ESCADA #JoyfulMoments"
Miranda, a former Victoria’s Secret angel, also recently announced a partnership with Wonderbra.
In the three images released for the new campaign, Miranda showed off her yoga toned body as she showcased the brand's latest range of lingerie.
She has also fronted a campaign for H&M, and in October of last year, she was named the face of Austrian crystal house Swarovski for their autumn/winter campaign.
Miranda is mother to three-year-old Flynn, and has previously talked of her desire to take better care of her time.
Miranda Kerr and Orlando Bloom
"I have felt this coming since my son was born", she told the Sydney Morning Herald of leaving Victoria’s Secret, before adding: "and, after I became a mother, I realised I needed to prioritise my time."
The 30-year-old split from her movie star husband Orlando Bloom at the end of 2013 after three years of marriage.
But she bumped into her estranged husband at one of Hollywood's Oscars after-parties earlier in March.
Stunning in a figure-hugging metallic dress with a deep plunging neckline, Miranda first saw her ex on the red carpet of the Vanity Fair after-party – when she was mid-interview with a TV crew.
Orlando, 37, didn't hesitate in greeting the Australian model, "Hi. You look amazing," said the British Hobbit star as he gave her a peck on the cheek.
He then asked if she was doing well, to which a surprised Miranda replied, "Yes."