They were detained by Poland's Internal Security Agency, TVP Info reported.
According to an English translation of a Polish news report, Weijing W. studied Polish at the Peking University of Foreign Studies and was hired by Huawei in 2006. Counterintelligence officers also collected physical documents and electronic data from the local offices of Huawei and telecom provider Orange.
The Chinese Foreign Ministry said Friday that it has asked Poland to handle the case fairly and protect the rights and safety of the Chinese suspect. Reports identified the Huawei employee as Weijing Wang and the Polish man as Piotr D. Each person could face up to 10 years in prison if convicted, the AP wrote.
Huawei said that Bradley will now serve as a "special consultant" to the company and help them according to the company's requirements.
"Huawei is aware of the situation, and we are looking into it", a spokesman for Huawei told multiple news organisations this morning. It said the man also went by the Polish first name of Stanislaw and had previously worked at the Chinese consulate in Gdansk.
At Huawei, Wang worked as a public relations director for more than five years before moving into his current role as sales director in 2017.
Huawei had ambitious plans in Europe to roll out next-generation "5G" mobile networks.
In December Huawei's chief financial officer Meng Wanzhou was arrested on suspicion of violating USA sanctions relating to Iran.
Orange Polska spokesman Wojciech Jabczynski told AFP that "ABW officials carried out items belonging to one of our employees on Tuesday". She has been released on bail, but faces a lengthy legal fight over extradition to the US.
Chinese authorities then detained two Canadians - a former diplomat and a business consultant - on suspicion of endangering national security. U.S. security officials have accused the company of posing a national security risk, something the company has repeatedly denied.
There has been no public evidence that Huawei's equipment has been used for spying and the firm has repeatedly denied the claims, but several western countries have restricted Huawei's access to their markets and have pressured Canada to do the same.