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mSix&Partners Announces Key Leadership Changes in Support of the Agency’s Growth

In her new role as CEO, North America, Kim Sivillo reports directly to Global CEO, Jack Swayne and will lead all North American agency operations, strategy, growth and client success. Former mSix&Partners CEO, North America, Belinda Smith, will now serve as Global DEI advisor across The&Partnership Group. 

MSix&Partners, stylized mSix&Partners, a joint venture between The&Partnership and GroupM, announced the appointment of Kim Sivillo as its new North America CEO. Former mSix&Partners CEO, Americas, Belinda Smith, will now serve as Global DEI advisor across The&Partnership Group. 

In her new role, Sivillo reports directly to Global CEO, Jack Swayne and takes responsibility for leading all North American agency operations, strategy, growth and client success.

“Kim’s appointment is a giant win for mSix&Partners and our clients,” said Swayne. “For more than 20 years, Kim has grown business, shaped culture, nurtured teams and innovated on behalf of world-class brands. Her leadership on clients, purpose and inclusivity are exactly what we were looking for as we apply our multidisciplinary approach to go further and faster in building great brands.

Smith’s work for The&Partnership Group is being delivered under the banner of her new DEI consultancy, The Second Arrow.

“We are delighted to continue our relationship with Belinda,” said Founder and Chair of The&Partnership, Johnny Hornby. “Her success advancing DEI across the global marketing industry and efforts on our behalf is indisputable.” 

“I am honored and excited to lead and grow the impressive team and clientele that mSix&Partners has established in the region,” said Sivillo. “The work the agency is doing to drive true success for clients like David Yurman and WSJ has set the bar high.  I am committed to working closely with the team to ensure we raise it even higher.” 

During Sivillo’s tenure at Assembly Global, she served in several key roles including President of Media Investment, Chief Client Officer and Chief Operating Officer.  Across these posts, she led all business operations, took command of the growth of its retail, luxury, financial services, politics, pharma and travel client engagements and was instrumental in the merging of Assembly and ForwardPMX.  As President of Media investment, Sivillo oversaw a diverse team responsible for $3 Billion in annual media spend across digital and traditional channels. Sivillo’s experience and leadership was particularly valuable during the pandemic when client and agency teams were under even greater pressure and needed steady and solid guidance. During this time, Sivillo developed, implemented and enforced new ways of working across departments to ensure improved efficiency, scale and a better client and employee experience.

At Dentsu (iProspect), Sivillo oversaw more than half of the agency’s clients across four offices, a book of business in excess of $100 Million in revenue and large segments of the agency’s luxury, retail, B2B, beauty, technology, DTC and pharma business.  She also built and managed high-performing account teams and delivered  impressive new business growth across clients such as Microsoft, the LVMH portfolio of brands, P&G, Diageo and others. 

At mSix&Partners, Sivillo now has responsibility for 100+ employees, 26 clients and $300 million in billings. 

With over 40 offices worldwide, m/SIX embraces a unique ownership structure between The&Partnership and GroupM. A progressive and entrepreneurial international media network that was born digital, the agency prides itself on its pioneering, energetic approach and honest culture.m/SIX specialises in driving business growth in the modern media landscape and helps client’s transition from a world of certainty to a new world of adaptability. m/SIX are the architects of bespoke, dedicated, multi-disciplinary teams that closely partner client marketing operations with data and technology placed firmly at the heart.