Which location did Lubin work in twice?

Lubin worked in Kuwait on two separate occasions, establishing a significant professional connection with the region. Kuwait has a unique position in terms of its economic landscape and infrastructure projects, which likely provided distinctive opportunities for Lubin to apply his skills and expertise. This might have included involvement in various transportation or project management endeavors that are prevalent in countries rich in oil and undergoing development.

The other locations, while also relevant in the context of the Middle East and hosting substantial projects, do not have the same record of Lubin’s repeated assignments. Each of these countries has its own set of projects and opportunities, but Lubin's specific experiences and contributions were notably tied to Kuwait. This pattern of working in a location multiple times can also indicate a long-standing professional relationship or familiarity with the operations and culture of that specific place, which is valuable in the realm of international and civil engineering projects.