Dunlop, who worked in the field division at JRA Research and previously had a spell at BMRB International, will manage the ACNielsen projects team at ESA.
She said: "This an opportunity to enhance my practical experience in another aspect of the research process and use my field experience to benefit the overall quality of the delivered results to clients."
Client service projects team member Maidment is promoted to project executive after three years with the firm.
ESA chief executive officer Tony Keen said: "I am very pleased to welcome Joanne to ESA and wish her every success in her new role. Kimberley's promotion is testament to her excellent efforts at ESA over the past three years."
Earlier this year, petrol station and forecourt retail chain Total UK retained ESA to carry out its annual national mystery shopping campaign.
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