In the 1880s he settled in Shreveport, Louisiana where he practiced as a lawyer.

In addition he got involved in the real estate business.

Between 1896 and 1912 Barret held a seat in the Louisiana State Senate, where he became President Pro Tempore in 1908.

In this function he was the deputy of Governor Luther E. Hall and he presided over the State Senate.

After the end of his term he did not hold any other political offices.