A Medical Council fitness-to-practise inquiry has found Dr Mohamed Abdelrahman guilty of professional misconduct on three counts.
The senior house officer at Letterkenny University Hospital failed to disclose to the vouncil, that its counterpart, the UK General Medical Council, had refused to register him on several occasions.
The report of today's inquiry will now go to the full Medical Council and it will make a decision on any sanction that might be imposed.
The inquiry earlier heard that the British authorities were not satisfied with the authenticity of a certificate Dr Abdelrahman provided in 2012 about his competency in English.
Dr Abdelrahman currently works in obstetrics and gynaecology at Letterkenny and qualified in Sudan in 2011.
He was registered with the Medical Council in Ireland in March 2015.
Dr Abdelrahman is facing three allegations of professional misconduct, poor professional performance and a breach of the Medical Practitioners Act before a fitness to practise inquiry which began today.
It was alleged that in his application for registration to the Medical Council in Ireland in June 2014, he did not disclose the refusal of the GMC in Britain to register him, as it was unhappy with an internationally recognised certificate he provided as to his competency in writing and speaking English.
The GMC later established that the scores on the IELTS certificate were not correct.
Dr Abdelrahman sat that English exam in Sudan and later claimed he had been the victim of fraud there.
John Freeman, lawyer for Dr Abdelrahman, told the inquiry his client accepts the factual allegations before this inquiry.
He said Dr Abdelrahman was 22 and a very young doctor at the time of the events.
Mr Freeman said Dr Abdelrahman was a doctor with an excellent academic record and there were no issues about patient safety.
He accepted that he was "not full and frank" in his engagement with the Medical Council and the GMC.
The inquiry has heard that he never practised as a doctor in Britain despite making seven applications there, three of which were for full registration.
However, Dr Abdelrahman did at a later stage sit an exam again and secure an acceptable IELTS certificate.
Mr Freeman said that Dr Abdelrahman asked that the inquiry deal with the matter by way of him giving certain undertakings to the Fitness-to-Practise Committee, including never to repeat the conduct which is the subject of this hearing, to accept a censure and also to pay a sum to a charity nominated by the council.
Eoghan O'Sullivan, lawyer for the Medical Council chief executive, opposed the application to have the matter dealt with by way of undertakings, given the gravity and severity of the allegations.
After retiring to consider the application by lawyers for Dr Abdelrahman, the committee decided not to accept it and to proceed to hear the direct evidence in the case.
Expert witness Professor Stephen Lane, consultant respiratory physician at Tallaght Hospital, told the inquiry the failure to disclose facts was "a serious failing".
He said Dr Abdelrahman had applied seven times to the licensing authority in Britain and had been refused and was well aware of this.
Prof Lane said it was "a very grave departure" from normal behaviour not to inform the Medical Council.
He said the elephant in the room was that a doctor who has been working in Ireland for a long time has admitted falsification of his application for registration.
Prof Lane said there was always room for remediation.
Dr Abdelrahman has told the inquiry that he made mistakes.
He said he was fully prepared to do whatever was necessary to ensure it does not occur again. He also said he will do an ethics course.
Dr Abdelrahman said he has been working as a senior house officer in Letterkenny and hopes to become a consultant in about ten years.
He was born in 1988 and told the inquiry that as the only son from his family in Sudan, he is expected to help support them.