Sia Partners Acquires Ethier

Sia Acquires Seven Consulting

August 7, 2026

Consulting

Sia, a global management consulting group, acquired Seven Consulting, an Australian management consulting firm focused on business transformation and program delivery/change management. The deal expands Sia’s presence in Australia—adding East Coast (Sydney and Melbourne) capabilities—and strengthens its ability to deliver AI transformation for enterprise clients.

Sia Acquires Kaiser Associates

January 29, 2026

Consulting

Sia has acquired Kaiser Associates, a boutique strategy consulting firm headquartered in Washington, D.C., to launch a dedicated Corporate Strategy, Private Equity & M&A business line and accelerate its U.S. expansion. Kaiser Associates’ leadership (Ali Cumber, Paul Mumma and Jon Meyerholz) will join Sia, with Jon Meyerholz named Managing Partner of the new business line; the deal is intended to broaden Sia’s strategic advisory capabilities and scale Kaiser’s services globally.

Sia Partners Acquires Notion Consulting

January 23, 2024

Consulting

Sia Partners has acquired Notion Consulting, a US-based strategic leadership and organizational change consultancy of about 25 experts. The deal expands Sia Partners' change management and organizational capabilities in the United States and strengthens its coast-to-coast business transformation offering.

Sia Partners Acquires Summus Group

October 5, 2021

Consulting

Sia Partners, an international management and AI consulting firm, has acquired Summus Group, a U.S.-based management consulting firm specializing in business and technology transformation for the financial industry. The deal adds ~80 consultants and strengthens Sia Partners' East Coast presence—notably Charlotte and Atlanta—while expanding its fintech and banking capabilities in the U.S.

Cerity Partners Acquires Sullivan & Serwitz

January 1, 2020

Financial Services

Cerity Partners, an independent financial advisory firm, has merged with Los Altos, California-based Sullivan & Serwitz, which manages approximately $1 billion in client assets. The combination expands Cerity's presence in Northern California and provides a succession plan and broader service offerings for Sullivan & Serwitz's clients and colleagues.

West Monroe Partners Acquires Etherios

October 26, 2015

IT Services

West Monroe Partners has acquired Etherios, a Platinum Salesforce Consulting Partner, with 7 Mile Advisors acting as exclusive sell-side advisor. Etherios' teams in Chicago, San Francisco and Dallas joined West Monroe's CRM practice effective October 26, 2015—creating a CRM team of more than 125 professionals—and the deal was reported to have been completed with Etherios coming from Digi International for approximately $9 million.