Can Muslims work with/for non-Muslim Government?

interesting article from http://www.jelas.org/ - ( jelas.org is the official site for ALKIS's writers)

There is no straight forward answer. However, there are evidence to suggest that this question has touched in the Koran. The bold instance is the whole of surah Yoosef (surah no 12), in particular verse no 55. The verse narrates that when Egypt was forecasted to have a seven-years long draught, the Prophet Yoosef (Joseph) offered himself to be the state treasurer. The king who was only identified by the holy Koran as al-‘Azeez, appointed Joseph to what his wished for. The second evidence is in surah Ghafir (surah no. 40) from verse 28 to 45. It was about a man who is believed as one of Fir’aun (Pharaoh) ministers or senior advisors. Others in the opinion that he was Pharaoh’s nephew. He did not only question Pharaoh’s conducts when to face with Prophet Moses, but also came out with very polite, knowledgeable and highly professional advice. The story about Pharaoh and the man wraps up at verse no. 45 with a decree that in the day judgement he escapes from the hellfire.

The third evidence is hidden in verse no 25 surah al-Fath (surah no. 48). Apparently, this verse is to advise Prophet Muhammad to refrain from entering Mecca in the 9th of the Hegira. By abiding Allah’s command, the Prophet who was defying opinions of most his companions who wished for attacking the Meccans who obstructed their way to the holy land, the Prophet signed a seized fire agreement with the disbelievers, known as the Treaty of Under the Tree. The wisdom of Allah’s ordains in this verse was only apprehended after the Conquest of Mecca a year later. It has been found that, prior to the incident a number of the Meccans, among which were still serving the pre-Islam Meccan regime but embraced Islam secretly. Among whom was Khaled bin al-Walid who later served as the Prophet’s army general. Not only that, Khaled has been the greatest Moslem army general ever known.

In the middle-age the history repeated. It was about Harun al-din al-Hamadani, born a Jew, embraced Islam during his teenage and served Hulagu regime. He served the government until the Hulagu’s grand-son era, Mahmood Ghazan who became moslem and expand the Islam Empire.

Although the four separate incidents address four different circumstances, one thing is common. That is these gentlemen who served the non-Moslem regimes discharged their duties nobly, consciously and undoubtedly highly professional.