Stuart McMain joins as senior networks engineer while Danny Thompson and Chris Hillcox have been appointed electricians.
McMain will be responsible for overseeing Advantex’s voice and data hardware and installation work as well as project planning and delivery.
Also boosting the team is Adrienne Lowry, who has been appointed as finance assistant, bringing considerable commercial and management experience to the role.
Dave O’Connell, operations director, said: "Our continued investment in high calibre people will see us well placed to provide the top-class skills, services and support that clients want for years to come."
Advantex now has a 50-strong team and is targeting a turnover of £6m in the next 12 months.