Rachael Lindemann has joined the Manchester-based agency as a senior accounts manager, and will work on global education company Pearson’s account.
Andy Rotheram has been appointed AV technician, joining from Lancashire-based MAC Design.
Staffordshire University graduate Julie Shenton has also been hired as junior designer, and Nick Fearnley joins from My Clever Agency as web designer.
HGA’s clients also include Phones 4u, Aldermore Bank, Bibby Financial Services, Goldsmiths, Zenos, SSL, Vimto and SHS Nutricia.
HGA Creative Communications managing director Michael Henderson said: "Our live events business has seen a strong increase in activity in the first part of this year, but it is the number, scale and complexity of the digital projects we have won that is driving a lot of our growth, consistent with our strategy."