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In most cases, a work permit has to be applied for by a business in Romania on behalf of its prospective employee.
It is the employer’s responsibility to prove that the position could not be filled by a Romanian or a candidate from another EU/EEA country.

The employer must also prove that the candidate has the qualifications and experience for the position. This requires supporting documents that an expat would need to provide. The process for obtaining a Romanian work permit can take several weeks.

Once an expat receives their work permit from their employer, they need to apply for a long-stay visa for work purposes at the Romanian embassy in their home country.
To get the visa, a number of documents will have to be submitted.

UAE: http://abudhabi.mae.ro/en

In order to comply with the requirements laid down in article 6 from Government of Romania Emergency Ordinance (GEO) 194/2002 modified, upon arrival in any Romanian border post, for the purpose of entry, you must comply with the following:

1. a) submit a valid travel document, recognised by Romania;
2. b) submit a Romanian entry visa or a residence permit, issued in accordance with the provisions of GEO 194/2002 modified through Law 157/2011 or, depending on the case, any authorization that grants the holder the right of transit or of stay on the territory of Romania, on the grounds of European legal instruments that are mandatory for and applicable to Romania, provided that it has not been differently settled through international agreements;
3. c) submit documents that justify the purpose of the trip, the conditions of stay and that probe the existence of appropriate means of support for the entire stay, as well as for the return to the country of origin, or for the transit towards another country where you are undoubtedly allowed entry;
4. d) the entry in the country of destination, as well as leaving the territory of Romania must be guaranteed, in the case of third-state citizens who transit the national territory;   
5. e) you do not belong to the category of third-state citizens who are refused entry on the territory of Romania, or have not been registered as undesirable; 
6. f) alerts with regard to the refusal of entry are not registered on your name in the Schengen Information System;
7. g) you do not represent a hazard to national security, order or health.

An expat’s long-stay visa is tied to their work permit, which is valid for a maximum of one year. Provided that they still work for the same employer, an expat would only need to renew their stay permit at least 30 days before it expires since the work permit would be renewed at the same time.

Expats travelling with their families will have to apply for a separate visa for each family member. Family members are not allowed to work in Romania unless they also have a work permit. Those already in the country on a temporary residence permit would have to apply for a work permit if they want to take up employment in the country.