Starbucks has reaffirmed its commitment to a constructive relationship with the Workers United union, as the coffee chain continues negotiations for collective bargaining agreements, Reuters reported.

In a letter addressed to union leaders, newly appointed CEO Brian Niccol reiterated his respect for workers' right to unionise and his desire to engage in "good faith" bargaining.

Niccol's statement comes in response to a letter from the union's bargaining delegation, which represents more than 10,500 Starbucks workers across nearly 500 stores.

The union urged Niccol to continue the spirit of mutual respect and to take bold steps to improve working conditions for employees.

While Niccol expressed a preference for direct relationships with workers, he acknowledged the importance of constructive engagement with the union.

His appointment had initially raised concerns among some Starbucks employees due to his previous experience at Chipotle Mexican Grill, where the company faced challenges in its relationship with the union.

Controversy also centres around Niccol’s 1,000-mile commute from his home in Newport Beach, California, US, to the company’s headquarters in Seattle, Washington.

This decision sparked criticism, particularly in light of Starbucks’ public commitment to sustainability.

Starbucks and Workers United have been negotiating since earlier this year to establish a framework for collective bargaining and union organising.

The coffee chain's reported commitment to constructive engagement with the union is a positive sign for workers seeking better wages, benefits, and working conditions.

Starbucks, a dominant force in the global coffee industry, is facing significant challenges that have called its longstanding market position into question.

With slowing sales and a brand identity that has become diluted over time, the company is at a critical crossroads.