The phrase "as a third generation" is correct and usable in written English.
It can be used to describe someone who is part of a lineage or family that has been established for three generations.
Example: "As a third generation farmer, I take pride in continuing my family's agricultural legacy."
Alternatives: "as a member of the third generation" or "as a descendant of three generations".
Upon graduation he started his career as a third generation attorney for Steptoe & Johnson, Washington, DC.
The move may also come amid another transition, as a third generation of the Newhouse family prepares to take command of the company.
[C1.] Another Chance for Japanese Cellphone Makers Japanese cellphone makers, restricted to markets in their own country because of differing technologies from the rest of the world, might get a new chance at global competition as a third generation of communications technology, known as 3G, spreads around the world.
The proposed system makes use of the novel idea of modeling a segment of music as a third generation CDMA mobile communications signal.
The video journal is introduced as a third generation form of scientific communication after the print-based journal and the digital online journal.
Algae was first regarded as a second generation feedstock but as it showed higher oil production yields with lower resource inputs than other feedstock, it was placed as a third generation feedstock.
A baseball blue-blood as a third-generation general manager, he won two World Series titles with the small-market Minnesota Twins before he turned 40.
As a third-generation Brooklynite, I enjoyed your City section devoted to Brooklyn.
But as a third-generation doctor, he also viewed his ancestor's plight in the light of medical ethics.
Abraham feels that, as a third-generation Arab-American, he has lost touch with his heritage, and he regrets this.
This is an improvement on old netbook chips, but still slower than a typical Core 2 Duo and nowhere near as fast as a third-generation Core i3.
