The tenure of Software Engineers in Seattle, WA is about two years.

tenure (n.):

1.a The act, fact, manner, or condition of holding something in one's possession, as real estate or an office; occupation. 1.b A period during which something is held.

2. The status of holding one's position on a permanent basis without periodic contract renewals: a teacher granted tenure on a faculty.

While the most common assocation for many people is that of definition 2., in university settings, it is the widely acceptable with the first definition, as in your sentence.

The tenure of Software Engineers in Seattle, WA is about two years.

From the Free Dictionary:

tenure (n.):

1.a The act, fact, manner, or condition of holding something in one's possession, as real estate or an office; occupation. 1.b A period during which something is held.

2. The status of holding one's position on a permanent basis without periodic contract renewals: a teacher granted tenure on a faculty.

While the most common assocation for many people is that of definition 2., in university settings, it is the widely acceptable with the first definition, as in your sentence.