The leadership team behind Elsevier’s Clinical Solutions is comprised of a dynamic group of business and clinical information experts, both on staff and as members of our external advisory boards.


Jay Katzen
President Clinical Solutions

Jay Katzen serves as President for the Clinical Solutions group within Elsevier. He is responsible for the Clinical Solutions P&L, including operations and strategy, sales, product, marketing, services and M&A.

Jay brings to Elsevier more than 23 years of experience in general management, marketing, product management, and software and business development for information providers. He joined Elsevier in 2007 as the Managing Director of the Academic & Government Markets. In 2012 he moved back into the healthcare segment and was named President of the Clinical Solutions business. Jay’s focus is on providing healthcare practitioners access to the most relevant clinical information and tools whenever and however they need it, to empower them to make better informed decisions that will save lives, improve overall care and lower costs.

Prior to joining Elsevier in 2007, Jay was the Senior Vice President of Marketing, Business Development and Knowledge Management at Micromedex, the Clinical Decision Support unit of Thomson Reuters. Prior to Thomson Reuters, he held the roles of Vice President of Marketing and Business Development with Unbound Medicine and Lexi-Comp, Inc.

Jay is based in Philadelphia and holds a B.A. in computer engineering from Case Western Reserve University and an M.B.A. from Cleveland State University.


Sonika Mathur

VP Strategy & Busniess Development

Sonika Mathur serves as Vice President, Strategy and Business Development for the Clinical Solutions group within Elsevier. She is responsible for the overall strategy for Clinical Solutions as well as leading strategic partnerships, M&A, portfolio optimization, strategic pricing and innovation.  

Sonika joined Elsevier in 2011 in its health sciences corporate strategy group and took a business unit strategy role in 2012, where among other accomplishments she led the acquisition and integration of the ExitCare patient education business. 

Prior to joining Elsevier, Sonika was a Senior Manager in Deloitte Consulting’s Strategy & Operations group focusing in healthcare and life sciences. Prior to Deloitte, she worked for several boutique healthcare consulting firms, including Healthlink and First Consulting Group, where she specialized in hospital IT projects. Sonika has over 15 years of strategy and operations experience in healthcare and her past clients have included academic medical centers, medical device and pharmaceutical companies, and government run health providers/plans.  Her work has focused on growth strategies, go to market, operations improvement, business process redesign, governance design, health policy analysis and health economics

Sonika is based in Philadelphia and holds a Masters in Public Health from Columbia University as well as B.A. in Biology and Psychology from the George Washington University.


Jonathan Teich, MD

Chief Medial Informatics Officer

Dr. Jonathan Teich is chief medical informatics officer for Elsevier Health Sciences. He has been active in medical informatics and health information technology for over twenty years. Dr. Teich’s responsibilities include a combination of vision, strategy, industry and government outreach, and broad product design for the continuing transformation of Elsevier’s huge content base and publication resources into multi-level electronic reference, highly interactive clinical decision support (CDS), and other knowledge-based tools to support direct clinical practice and healthcare delivery. 

Dr. Teich is an assistant professor of medicine at Harvard, and a board-certified attending physician in emergency medicine at Brigham and Women's Hospital (BWH).  He was the founder and first director of the Clinical Informatics Research and Development department at Partners Healthcare System.  He was the primary designer of many of BWH's clinical information applications, including the computerized physician order entry system, ambulatory record, clinical decision support systems, emergency medicine systems, and the Handbook electronic information library. 

Dr. Teich has authored or co-authored over 100 papers, books, and other publications in the field of medical informatics and healthcare information systems, with a particular concentration in CDS  He is a co-author of the book, Improving Outcomes with Clinical Decision SupportAn Implementer’s Guide.  He co-chaired the panel responsible for the HHS-sponsored Roadmap for National Action on Clinical Decision Support, and from 2009-2012 he served as a subject-matter expert on CDS matters for the Office of the National Coordinator (ONC).  He has served on the board of directors of AMIA, HIMSS, and the eHealth Initiative, and is a fellow of the American College of Medical Informatics and of HIMSS.  Dr. Teich was educated at Caltech, MIT, and Harvard Medical School.


Michelle Troseth, MSN, RN, DPNAP, FAAN

Chief Professional Practice Officer

Michelle is the Chief Professional Practice Officer of Elsevier Clinical Solutions.  She has over 25 years of experience in co-designing and implementing evidence-based practice and technology infrastructures to support patient-centered care and interprofessional integration at the point of care across hundreds of healthcare settings.

Michelle is currently co-chair of the TIGER Initiative Foundation (which stands for:  Technology Informatics Guiding Education Reform) Board of Directors; she served as the TIGER Summit Program Chair, and co-led a national collaborative on Usability and Clinical Application Design. She is also the co-chair of the American Academy of Nursing’s Informatics & Technology Expert Panel. Michelle is also on the Executive Committee as Treasurer for the National Academies of Practice (NAP) whose mission is to promote excellence in practice of healthcare professionals and quality healthcare for all through interprofessional collaboration in service delivery, research, education and public policy advocacy.

 Michelle has authored several chapters/articles and speaks on professional practice, evidence-based practice, technology and cultural transformation.


Diane Bartoli

SVP & GM Clinical Reference & Workflow

Diane Bartoli is the Senior Vice President and General Manager of the Clinical and Reference Workflow Product Group within the Clinical Solutions (CS) group in Elsevier. She manages a portfolio of electronic products that focuses on delivering the right content, in the right form at the right time so that physicians, pharmacists and nurses can provide the best-informed care. Products include ClinicalKey, Gold Standard drug information, CarePoints and InOrder, integrated care planning and order set solutions, and ExitCare patient information solutions, among others.

Diane joined Elsevier in 2001 as a Manager in the Elsevier Strategy group before moving to Marketing and Product Management roles within the Health Science business, including Product Director of Elsevier’s Health Advance, a journal hosting platform supporting society and Elsevier-owned journal publications. It was as Vice President, Institutional eJournals in late 2009 that she was proposed and lead a project which resulted in ClinicalKey, a clinical reference product that leverages leading semantic search technology to provide trusted and comprehensive clinical answers fast.  Prior to Elsevier, Diane was a Management Associate at PriceWaterhouseCopper’s Information, Communication and Entertainment (ICE) Strategy Group, an Editor at Random House for the Dell Publishing imprint, and co-founded a successful literary agency. 

Diane graduated magna cum laude from George Washington University with a Bachelor’s degree in English and received an M.B.A. in Finance from New York University. She lives in Philadelphia with her husband, author Neal Bascomb, and two daughters.


Linda Belfus

Senior Vice President and General Manager of Content, Clinical Solutions

Linda Belfus is Senior Vice President and General Manager of the Clinical Solutions Content organization.  Linda is responsible for the Books and Clinics (Review Series) P&Ls as well as Content strategy, creation, acquisition, development, evidence, and editorial workflows across several key content types, including Point of Care, Patient Education, Order Sets, Drug Information, Clinical Practice Guidelines, Books and eBooks, and Clinics.

Linda’s focus is on creating fresh approaches to content creation and delivery that fit users’ workflows and address their needs, new business models, and incorporation of a strong evidence base across the Content portfolio.

Prior to joining Elsevier in 2002, Linda co-founded and served at President and CEO of Hanley & Belfus, a Philadelphia-based medical publisher that produced a wide range of medical content and respected brands such as The Secrets Series and Crush Series that are still thriving today.  The company was acquired by Elsevier in 2002.

Linda received a BA in English Literature from Penn State University and an MA from Villanova University.  She is based in Philadelphia


Hajo Oltmanns

Senior Vice President and General Manager Performance Management and Services

Hajo Oltmanns serves as Senior Vice President and General Manager for the Performance Management and Services business within the Elsevier Clinical Solutions group. He is responsible for the Performance Management solutions, transformation, implementation and customer support services, as well as HIT vendor business development.

Hajo is focused on helping healthcare providers improve outcomes and create the best places to give and receive care. Hajo builds on more than 16 years of experience in management, strategy, and business development. Hajo joined Elsevier in 2007 as Vice President Strategy in Amsterdam. In 2009 he became the Senior Vice President responsible for strategy and business development for Elsevier’s health sciences businesses before moving into a role managing Elsevier’s care planning and order sets businesses in 2011.

Prior to joining Elsevier in 2007, Hajo was a Manager at the Boston Consulting Group in Chicago and worked in the investment banking division of Credit Suisse First Boston in London and New York as well as for the Holtzbrinck Group in Germany.

Hajo is based in Philadelphia and holds an MA in modern history and politics from the University of Edinburgh and an MBA with distinction from the Kellogg School of Management at Northwestern University.


Cindy Cook

Chief Marketing Officer

Cindy is Chief Marketing Officer for Clinical Solutions and Education. She is responsible for marketing Elsevier's expanding portfolio of digital and print products and solutions for the healthcare industry.  This new role will help form a tighter connection between the medical, nursing and pharmacy education and professional practice.

Previously, Ms. Cook was Executive Vice President, Chief Marketing Officer at Cengage Learning, a $2 billion higher education publisher.  She oversaw Cengage Learning’s marketing and external communications activities. She was a member of the senior leadership team helping drive company direction and strategy including helping drive the company’s transformation from print to digital. 

In her prior roles, she has over 20 years of expertise in global consumer products at Fortune 100 companies, with specific experience including interactive entertainment and digital media.  Previously, Ms. Cook served as Chief Strategy and Marketing Officer of Vivendi Games, creator of some of the industry’s largest and most profitable games including World of Warcraft. She ran marketing for the company and was directly accountable for the mobile and casual games divisions. She also drove strategy for the company and was a member of the senior management team that completed a successful merger with Activision, creating Activision Blizzard, the world’s largest videogame publisher.

Ms. Cook was one of the pioneers in digital music, launching the first commercial download and subscription services at Universal Music Group, the world’s largest music company. Earlier in her career she held a variety of management roles at Pepsi Cola, Seagram and General Electric.

Mrs. Cook earned B.S.in Finance from Lehigh University and an MBA in Marketing from New York University’s Stern Graduate School of Business. She is a member of the Lehigh University, College of Business and Economics Dean’s Advisory Council and serves on the SIIA Board of Directors. 


Scott Schlesner

Senior Vice President of Sales

Scott Schlesner is the Senior Vice President of Sales for the Clinical Solutions Division of Elsevier.  He has over 25 years of experience with both emerging and established companies in the healthcare industry, including Baxter, GE Healthcare, Wolters Kluwer Health, and Leica Biosystems.  He has a strong foundation of knowledge in healthcare information technology, histology/pathology, radiology, cardiology, surgery and nursing.  Scott has a proven track record of building and leading consultative, customer-focused teams responsible for promoting solutions that improve patient outcomes, work-flow productivity, and profitability for healthcare providers.  Scott holds a B.S. degree and an MBA from the University of Wisconsin-Madison.