He developed his family paper manufacturing company into a major industrial enterprise.

[1] Laroche-Joubert and his brother Jean officially took over the business from their father in July 1845 at a time when the paper mills were already using modern technology that had been developed in the first half of the century.

In addition to the family factory of Nersac he founded several other plants and created a large industrial enterprise in Angoulême, which became "Laroche-Joubert, Lacroix et Cie" in 1863.

[2] Laroche-Joubert mechanized the plants of the two main manufacturing centers of L’Escalier and Girac in La Couronne.

The business continued to grow in the 1850s after the crisis of 1848, winning medals at the Paris expositions for the quality and originality of the paper products.

The company was known for high quality writing papers that could be watermarked with all sorts of drawings at the choice of the buyer.

[6] In 1857 Laroche frères transformed one of four wheat mills on the Basseau dam into an annex of the Martinet paper company.

[5] Throughout his life he strove for cooperation based on the principle of employee participation in the prosperity of the company.

He wrote later, "The moral and material improvement of the lot of the greatest number has always been the object of my persevering efforts.

"[2] Daniel Touzaud wrote in 1884, La Maison Laroche-Joubert has created various beneficent institutions for the advantage of its personnel.

[9] Laroche-Joubert was appointed a judge of the Commercial Court of Angoulême, Angoulême City Councilor, director of the savings bank, administrator of the charity office, and a member of General Council of the Charente department.

[11] As a Republican, on 14 July 1970 he attempted to delay debate on the war with Prussia through a filibuster.

A bill asking for gymnastics to be taught in prisons was rejected on the basis that it would help "the greatest number" of thieves to climb the walls.