The Brazilian company reduced costs amid a reduction of revenues.
The construction company debuted its investment project certificates (CerPIs) on the local stock exchange, raising 3bn pesos (US$147mn).
The 2.5mn-euro grant is a donation from the German government.
Other topics to be put out to consultation in the same process include the 10 priority projects and programs the president-elect is proposing to undertake during his government.
Flooding reconstruction is going ahead in the hope of avoiding delays in projects once thousands of recently-elected local officials take office in January.
The studies to upgrade and expand the La Aurora international airport serving Guatemala City are being carried out by a consortium comprised of consulting firms Deloitte and Tetra Tech.
The economic bids of the three firms challenging for the operating contract will be unveiled in January. In the meantime, the government of the Argentine capital requested that the current concession be extended for another year.