Executive Summary

About Us

Executive Summary brings together senior specialists in research, analysis, strategy, editorial, data and production. The team is led by managing partners Stefan Tornquist and Jim Clark.

Leadership

Meet the Managing Partners

Together, Stefan and Jim have authored more than 160 studies for organizations including Adobe, Google, IBM and Oracle.

Stefan Tornquist

Managing Partner

Stefan Tornquist

Stefan leads Executive Summary RSI alongside Jim Clark. He has more than 20 years of experience in research and strategy, helping organizations understand change and act on it.

He has authored more than 100 studies across marketing, technology, consumer behavior and business transformation, working with organizations including Adobe, Google, IBM, Microsoft, Oracle and Salesforce. At Econsultancy, Stefan led its North America research team before building its learning and curriculum programs, turning research into training organizations could use directly.

Before Econsultancy, Stefan was Research Director at MarketingSherpa, leading large-scale benchmark studies of digital marketing. At the start of his career, he co-founded mar-tech pioneer Bluestreak, now part of Dentsu.

His research and analysis have appeared in outlets including The New York Times, The Wall Street Journal, BBC, CNN, CNBC and NPR. He is also President and co-moderator of Research Wonks, a professional community of more than 1,500 researchers, analysts and data scientists.

Stefan leads Executive Summary RSI alongside Jim Clark, drawing on more than 20 years in research and strategy to help organizations understand change and act on it. He works with clients across marketing, technology, consumer behavior and business transformation, moving between benchmark studies and learning programs that put research into practice. His experience spans research, ad-tech and organizational learning, giving him a practical view of how evidence informs decisions and shapes what organizations do next.

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Jim Clark

Managing Partner

Jim Clark

Jim leads Executive Summary RSI as Managing Partner, taking clients from business problem to commercial outcome. He identifies what evidence is needed, designs and leads the research and shapes the strategic or editorial narrative, with a focus on how findings can influence audiences, support decisions and create commercial opportunities.

He brings more than 20 years of experience leading research and thought leadership programs at Econsultancy, Accenture Interactive and the IPA. Across those roles, he built and led teams, managed major programs and worked with C-suite stakeholders to shape research strategy. At Econsultancy, his work with Adobe helped grow Digital Trends into Adobe's most successful content program globally, surveying more than 100,000 executives.

Since joining Executive Summary RSI in 2025, Jim has helped shape the company's positioning and developed ongoing research and content partnerships. He regularly presents research and insight at industry events and has appeared on BBC News discussing marketing and technology trends.

Jim leads Executive Summary RSI as Managing Partner, taking clients from business problem to commercial outcome. He works out what evidence is needed, designs and leads the research and shapes how the findings are used. That range comes from more than 20 years leading research and thought leadership programs at Econsultancy, Accenture Interactive and the IPA. Across those roles, he built teams and worked directly with C-suite stakeholders.

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Research, editorial and production

Meet the wider team

Keith O'Brien

Keith O'Brien

Executive thought leadership, ghostwriting and content strategy

Keith is a writer, editor and content strategist with more than 20 years of experience developing B2B thought leadership and executive content. A former editor-in-chief of PRWeek, he helps senior leaders turn their expertise into articles, reports, white papers and ongoing content programs. His public archive includes work for IBM and Realeyes.

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Morag Cuddeford-Jones

Morag Cuddeford-Jones

Research interpretation and editorial insight

Morag is a journalist and editor who specializes in finding the story within complex research and business evidence. She is Editor of the Chartered Institute of Marketing's Catalyst magazine and has written research-led analysis for Marketing Week.

Read full bio
Eagranie Yuh

Eagranie Yuh

Thought leadership and narrative development

Eagranie is a thought leadership strategist and writer who turns research and expertise into clear narratives. Her work spans white papers, research-led reports, executive interviews, case studies and podcasts across financial services, insurance, risk and talent. For Accenture, she hosted Insurance Influencers, an interview series with founders, investors and industry leaders.

Read full bio
Ellie Wilson

Ellie Wilson

Editorial production

Ellie is an editor and production specialist with experience taking complex content from working draft through to finished publication. At Ilex, she was Senior Editor on major illustrated books, including Alan Moore: Storyteller. At Econsultancy, she became Digital Production Manager, bringing that production discipline to digital business publishing and research-led content.

Read full bio
Mihai Andrei

Mihai Andrei

Video and multimedia production

Mihai is a video producer and editor who works with expertise, research and live conversations to create video, audio and event content. For Marketing Week, he has produced a multi-year podcast series, including video podcasts made in partnership with Google. For Executive Summary, he also helps shape research and conversations into finished video.

Read full bio
Yashraj Jain

Yashraj Jain

Research design, analytics and benchmarking

Yash is a research and insights specialist with more than 15 years of experience across quantitative and qualitative research, analytics and benchmarking. At the University of Westminster, he worked on six editions of the CASE-Ross Support of Education research across the UK, Australia and New Zealand. He has also published mixed-method research for the DMA.

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Sean Donnelly

Sean Donnelly

Research, frameworks and advisory

Sean is a research and advisory specialist who turns evidence into practical frameworks and guidance organizations can use. At Econsultancy, he was senior analyst and report author on Skills of the Modern Marketer, combining interviews with marketing leaders, quantitative research with more than 500 marketers and a review of academic and professional literature.

Read full bio
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Managing Partner

Stefan Tornquist

Stefan leads Executive Summary RSI alongside Jim Clark. He has more than 20 years of experience in research and strategy, helping organizations understand change and act on it.

He has authored more than 100 studies across marketing, technology, consumer behavior and business transformation, working with organizations including Adobe, Google, IBM, Microsoft, Oracle and Salesforce. At Econsultancy, Stefan led its North America research team before building its learning and curriculum programs, turning research into training organizations could use directly.

Before Econsultancy, Stefan was Research Director at MarketingSherpa, leading large-scale benchmark studies of digital marketing. At the start of his career, he co-founded mar-tech pioneer Bluestreak, now part of Dentsu.

His research and analysis have appeared in outlets including The New York Times, The Wall Street Journal, BBC, CNN, CNBC and NPR. He is also President and co-moderator of Research Wonks, a professional community of more than 1,500 researchers, analysts and data scientists.

Close

Managing Partner

Jim Clark

Jim leads Executive Summary RSI as Managing Partner, taking clients from business problem to commercial outcome. He identifies what evidence is needed, designs and leads the research and shapes the strategic or editorial narrative, with a focus on how findings can influence audiences, support decisions and create commercial opportunities.

He brings more than 20 years of experience leading research and thought leadership programs at Econsultancy, Accenture Interactive and the IPA. Across those roles, he built and led teams, managed major programs and worked with C-suite stakeholders to shape research strategy. At Econsultancy, his work with Adobe helped grow Digital Trends into Adobe's most successful content program globally, surveying more than 100,000 executives.

Since joining Executive Summary RSI in 2025, Jim has helped shape the company's positioning and developed ongoing research and content partnerships. He regularly presents research and insight at industry events and has appeared on BBC News discussing marketing and technology trends.

Close

Executive thought leadership, ghostwriting and content strategy

Keith O'Brien

Keith is a writer, editor and content strategist with more than 20 years of experience developing B2B thought leadership and executive content. A former editor-in-chief of PRWeek, he helps senior leaders turn their expertise into articles, reports, white papers and ongoing content programs. His public archive contains more than 400 pieces, including 45 for IBM and 64 for Realeyes. For Realeyes, he co-authored The Guide to the TikTok Creator Economy, an independent study of creative performance and audience attention.

Close

Research interpretation and editorial insight

Morag Cuddeford-Jones

Morag is a journalist and editor who specializes in finding the story within complex research and business evidence. She is Editor of the Chartered Institute of Marketing's Catalyst magazine. For Marketing Week, she has written research-led analysis on employee and customer experience, CX maturity, loyalty and organizational performance. For Reuters Events, she turned interviews with senior insurance leaders into a single narrative report, Getting Personal, part of its Future of Insurance series.

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Thought leadership and narrative development

Eagranie Yuh

Eagranie is a thought leadership strategist and writer who turns research and expertise into clear narratives. Her work spans white papers, research-led reports, executive interviews, case studies and podcasts, with experience across financial services, insurance, risk and talent. For Accenture, she hosted Insurance Influencers, an interview series with founders, investors and industry leaders on innovation, culture, data and industry change. For mcx.io, she turned founder Michael Costonis's 30 years of experience into training scripts and a codified knowledge base.

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Editorial production

Ellie Wilson

Ellie is an editor and production specialist with experience taking complex content from working draft through to finished publication. At Ilex, she was Senior Editor on major illustrated books, including Alan Moore: Storyteller, working within multidisciplinary teams spanning commissioning, art direction, design and production. At Econsultancy, she became Digital Production Manager, bringing that discipline to digital business publishing and research-led content. At Executive Summary, she applies it to reports involving researchers, writers, clients and designers across several rounds of review.

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Video and multimedia production

Mihai Andrei

Mihai is a video producer and editor who works with expertise, research and live conversations to create video, audio and event content. For Marketing Week, he has produced a multi-year podcast series, including video podcasts made in partnership with Google, built around consumer research, changing search behavior and AI-powered discovery. For Econsultancy, his work spans learning programs, events, interviews and the Capability Leaders Forum, alongside testimonials, event films and photography. For Executive Summary, he helps shape research and conversations into finished video, contributing to the editorial structure as well as the production.

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Research design, analytics and benchmarking

Yashraj Jain

Yash is a research and insights specialist with more than 15 years of experience across quantitative and qualitative research, analytics and benchmarking. At the University of Westminster, he worked on six editions of the CASE-Ross Support of Education research across the UK, Australia and New Zealand, alongside longitudinal studies, UX testing and customer experience evaluation. For the DMA, he was corresponding author on the Customer Acquisition Barometer, combining quantitative and qualitative research among 116 marketers with two focus groups. Through the Trade Association Forum, he works on strategic benchmarking and advises organizations on research strategy, engagement and insight dissemination. A 2025 program he supported gathered 126 valid organizational responses to build financial, salary, staffing and operational benchmarks for UK trade associations.

Close

Research, frameworks and advisory

Sean Donnelly

Sean is a research and advisory specialist who turns evidence into practical frameworks and guidance organizations can use. At Econsultancy, he was senior analyst and report author on Skills of the Modern Marketer, combining interviews with marketing leaders, quantitative research with more than 500 marketers and a review of academic and professional literature. He also developed the research behind its 10Cs Modern Marketing Mindset framework. At Dublin City University, he led more than 150 consulting projects across digital marketing, ecommerce and e-learning before moving to Econsultancy.