Emma shows her pedigree.
The bio-medical technology graduate is the new custodian of the secret recipes that give Marston's beers their distinctive flavour.
She will also be in charge of the guest ale programme at Burton-upon-Trent helping to create new beers.
Ms Gilleland said: "I am absolutely thrilled to be Marston's head brewer. Although beer is traditionally a man's world, making sure our ales go out in top condition is my absolute passion and being a woman hasn't got in the way of that.
"I enjoy the challenge of being in charge of a brand that people love and being partial to the odd pint of Pedigree is a distinct advantage in my new job!"
She joined Marston's straight from university in 1994, working her way up through the ranks.
"I do like to taste all of the beers and have a tasting session every day to ensure all the brands are up to scratch. I take my job very seriously."