Work in Yemen is difficult to obtain as a foreigner. The collections of young men waiting in public areas and by the roadside looking for work does not reflect a lack of jobs. Rather, it reflects that many Yemenis do not have enough education to work in non-manual jobs. As a result, immigrants from sub-Saharan Africa are often seen in service industries with a popular joke among expats being that "something typically Yemeni" is in fact an Ethiopian maid. Educated westerners do not, however, have it easy as there are many bureaucratic hurdles to working in Yemen. Most westerners who find jobs there tend to be working as expat staff for a western company with interests in the country.
The only exception is that if you're an English native speaker, a lot of places in big cities, ranging from schools through universities to governmental organisations and companies are desperate for English teachers, and usually don't require any qualifications. Sometimes it is even possible to get a teaching job if English is not your first language.
Also in Sana'a the local English-language magazines often need proofreaders.
Particularly in Sana'a, there are institutes offering instruction in Arabic. The advantages of learning the language in Yemen are that the dialect spoken is often quite close to Classical Arabic, and also that languages other than Arabic are much less commonly spoken than they are in nearby countries. However, the one important exception to this rule is the Old Sana'a dialect, which is difficult to understand even for Arabs from other countries, and becoming completely incomprehensible when combined with a big ball of qat in the speaker's cheek.
Yemen is country that everywhere just simply must be visited. It is a tourist's country, where although the accommodation might not be the best, but the country itself holds so many treasures that appeal to any open-minded visitor. The sights are amazing, the people are friendly, their culture is unique, and their food is tasty. Take trips with a personal driver through the mountains to see natural beauty located nowhere else on the planet. See the historical role Yemen played as it survived even during the times of the Sumerians and the Ancient Egyptians, and how no one was able to completely conquer Yemen. And enjoy what the country provides, like gemstones literally littered thoughout the mountains, precious beaches, and historical artifacts from this multi-faced nation with one heartbeat.