US accounting and consulting practice Armanino has expanded its network by bringing south-east-focused operator MSTiller (MST) into its organisation.

Established in 1956, MST works with middle-market companies, family owned enterprises and private foundations across a variety of sectors.

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The company, with around 110 professionals, operates from offices in Georgia and New York.

The move is expected to deepen Armanino’s capabilities in tax, audit and advisory work, while extending its presence in the south-east.

Armanino Advisory CEO Matt Armanino said: “MST is an exceptional firm with a strong reputation, talented professionals and trusted client relationships that have proven the test of time.

“MST strengthens our ability to deliver our services with an incredible focus on client outcomes while deepening our presence in one of the fastest-growing regions of the US.”

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With this deal, clients of MST will gain access to Armanino’s broader service platform including its technology and digital transformation consulting offerings.

They will also be able to tap into specialist tax capabilities such as international tax and transfer pricing, multi-state tax planning, state and local tax, tax credits and incentives, transaction-related advisory services and valuations.

MST managing partner Angela Griner said: “Armanino stood out because of its culture, foresight and a trusted relationship built over decades.

“Our long history of working alongside Armanino through the Moore Global network, combined with their commitment to technology, AI and modern service delivery, gave us confidence that we can better serve increasingly complex client needs while maintaining the core values of our firm that have defined us since our founding.”