The Edelman team will be led by European director of technology Imogen Bailey and PA director Bernard Hughes in London, while Christel Van Der Boom, senior partner of Edelman-DLV Amsterdam will lead operations in Holland.
Account director Vanessa Wong said the brief was expected to establish CompTIA's professional accreditations as a global standard, while providing PA support, strategic advice and media relations.
The agency enjoys a far higher profile in the US than in Europe, she added.
The non-profit CompTIA has not previously appointed a European agency.
Around 500,000 people worldwide have earned CompTIA certifications.