The Mail & Guardian can confirm that the two were employees of state-owned arms manufacturer, Denel.
Denel spokesperson, Vuyelwa Qinga, said the company was gathering more information and would inform the families of the victims once their identities had been confirmed.
"We can confirm that we have been made aware of the incident and that among those dead are two Denel employees. At this moment we don't have any further information. We have someone on the ground who is gathering information so that we can inform the victim's next of kin," she said.
Denel's chief executive Riaz Saloojee said in a statement:
“This is a very unfortunate incident but Denel will continue to support all peace-keeping efforts carried out under the auspices of the United Nations and the African Union. In this instance our employees lost their lives while they were providing services to the UN’s peacekeeping efforts in the region."
Qinga said Denel was contracted to the United Nations to perform "camp maintenance services" at the Mogadishu compound.
"This involves general maintenance, as well as the provision of catering and cleaning services," she said.
Somalia's al-Qaeda linked al-Shabab insurgents shot and blasted their way into the UN compound in Mogadishu on Tuesday, leaving eight people dead.
Somalia's Prime Minister Abdi Farah Shirdon condemned the brazen daylight raid as a "senseless and despicable attack on innocent UN civilians".
Al-Shabab fighters, who boasted about the killings, used both a car bomb and suicide attackers to blast their way into the fortified base in central Mogadishu near the airport.
According to Denel's statenet, the remaining employees in Somalia have been moved to facilities under the protection of the United Nations Office for Project Services (UNOPS) where they are reported to be safe. – Additional reporting by AFP