Executive Management

D.G. Macpherson is the Chairman and Chief Executive Officer of W.W. Grainger, Inc.

From 2015 to 2016, D.G. served as Grainger’s Chief Operating Officer, and prior to that, he was Senior Vice President and Group President, Global Supply Chain and International, where he led the development of corporate strategy and continuous improvement, the global supply chain organization, the company’s single channel online business model and international operations in Asia and Europe.  

D.G. joined Grainger in 2008 from the Boston Consulting Group (BCG), where, from 2002-2008, he was Partner and Managing Director. In that capacity, he served as a consultant to Grainger on several strategic and operational efforts including availability improvement, pricing strategy, product line expansion and sales force effectiveness.  

At BCG, D.G. was a member of the Industrial Goods Leadership Team with strong experience in production systems and continuous improvement methodologies. Early in his career, he was an operations manager for Rain Bird Sprinkler Manufacturing Company and a test engineer with the U.S. Air Force.  

D.G. holds a bachelor’s degree from Stanford University and an MBA from Northwestern’s Kellogg School of Management.  

D.G. served on the International Paper Company Board of Directors from 2021 to 2024, and currently sits on the Museum of Science and Industry Board of Trustees. 

Nancy Berardinelli-Krantz is the Senior Vice President and Chief Legal Officer of W.W. Grainger, Inc. She oversees the company's corporate affairs organization which includes communications and public affairs, ethics and compliance, environmental social governance (ESG), legal, environmental, health and safety and security and loss prevention teams.  

Nancy is an accomplished leader with extensive legal, ethics and compliance experience and leadership in the Army. She joined Grainger from Eaton Corporation in January 2023, where she was Senior Vice President and Deputy Chief Legal Officer. There she oversaw a global team of attorneys and legal professionals. Prior to Eaton, Nancy served in leadership positions at The Goodyear Tire & Rubber Company and worked for the international law firm of Jones Day. She is also a Veteran of the United States Army, Judge Advocate General's Corps, where she served as a trial attorney in Fort Hood, Texas, and for the Contract Appeals Division in Washington, D.C. She also served as a trial defense counsel in Baghdad, Iraq. 

Nancy earned a bachelor's degree in political science from John Carroll University, and a juris doctorate, magna cum laude, from the Cleveland-Marshall College of Law. 

She currently serves on the board of trustees for The Command Purpose Foundation, an organization serving the next generation of veteran leaders to bridge the gap between military and civilian life. She also serves on the board of trustees for The Cleveland State University Foundation. Nancy is a 2024 Daniel Burnham Fellow, selected by Leadership Greater Chicago, joining top executives in advancing workforce and economic progress through community investments and partnerships. 

Nadalie Bosse is the Group Vice President of Customer Experience of W.W. Grainger, Inc. Nadalie is responsible for leading Grainger’s multi-channel, geographically dispersed customer service organization including customer service centers, technical product support, online customer service, order to cash and strategic account support. She provides strategic and operational leadership in developing and delivering strategies that drive superior service, customer intimacy, and incremental revenue growth. 

Nadalie is leading Grainger’s focus on building customer order capabilities and systems, one of the company’s biggest customer software development efforts. This enhancement is focused on designing and building an order model and system that is effective, durable and positions the company for long-term advantage. 

Prior to joining Grainger in 2016, Nadalie held various leadership roles with Motorola Solutions, VeriSign, Tellabs, and AT&T.  

Nadalie earned a bachelor’s degree in industrial engineering from Kansas State University and a master’s degree in business from the University of Kansas.  

She is on the board of trustees of The Chicago Academy of Sciences/Peggy Notebaert Nature Museum and a member of the Kansas State University Department of Industrial Engineering Advisory Council.  

Barry Greenhouse is Senior Vice President, Merchandising and Supplier Management, of W.W. Grainger, Inc. He oversees the company’s merchandising capabilities, supplier relationships and cost management.  

Since joining Grainger in 2004, Barry has held several roles of progressive responsibility, most recently as Senior Vice President, Global Supply Chain and Customer Experience, where he was responsible for all aspects of the customer experience from order to delivery, as well as the overall design and capabilities for Grainger’s industry-leading fulfillment network. His leadership was instrumental during Grainger’s response to the COVID-19 pandemic, ensuring continuity in supply chain operations as an essential business providing critical products to help customers maintain a safe, healthy and productive work environment. 

Barry earned a bachelor’s degree in biology and an MBA, both from the University of California, Los Angeles.  

Prior to joining Grainger, Barry held roles in operations, sales, marketing, and project management at McMaster-Carr and Webvan.  

He serves on the board of trustees for Grainger-affiliated MonotaRO, a Japan-based leading eCommerce direct marketer of maintenance, repair and operating (MRO) products. He also serves on the advisory board of the Marquette Center for Supply Chain Management and the board of FIRST Illinois Robotics, which designs accessible, innovative programs that motivate young people to pursue education and career opportunities in science, technology, engineering and math (STEM). Recently he was appointed to the board of Erika’s Lighthouse, an organization dedicated to the prevention, early identification and early intervention of youth mental health issues.   

Anand Lal is the Group Vice President, Supply Chain, of W.W. Grainger, Inc. He oversees the functions responsible for ensuring operational excellence across the company’s extensive supply chain, including inventory management and supplier performance, transportation, and network design. 

Anand joined Grainger in 2016 as Vice President, Corporate Strategy, Analytics and Customer Insight, and later was promoted to Group Vice President, Customer Strategy, Sales Operations and Marketing, where he oversaw customer segmentation and strategies, customer information, and sales operations for Grainger’s U.S. business. Additionally, he led the brand and marketing function for Grainger’s U.S. and Canada business from 2018-2023.  

Prior to Grainger, Anand was a Principal at the Boston Consulting Group, where he served clients in the industrial and distribution sectors on variety of topics, including growth strategy, pricing, sales and marketing and mergers and acquisitions. Prior to BCG, Anand worked at Motorola in a variety of engineering and research roles. 

Anand earned a bachelor’s degree in engineering from Indian Institute of Technology, Roorkee, a doctor of philosophy degree in engineering science from Penn State University, and an MBA with distinction from Northwestern University’s Kellogg School of Management.    

Jonny LeRoy is the Senior Vice President and Chief Technology Officer of W.W. Grainger, Inc. He is responsible for the technology systems, security and operations that underpin Grainger’s business model.  

Jonny joined Grainger in 2020 after a 15-year career at ThoughtWorks, where as Head of Technology for North America, he led their technology organization, growing new offerings and capabilities, while also helping to progress their talent, culture and delivery expertise. In prior roles at ThoughtWorks, Jonny served as Market Tech Principal for the West Coast and Lead Developer in the U.S. and UK. Earlier in his career, Jonny was a founder and CTO of a successful UK start-up.  

Jonny holds CPE from Westminster University, and a MA, Literae Humaniores from the University of Oxford. Jonny is a 2022 Daniel Burnham Fellow with Leadership Greater Chicago and is on the governing body of the Evanta Chicago CIO community. He also serves on the Board of Advisors for the Illinois Institute of Technology (IIT) College of Computing.  

Deidra (Dee) Merriwether is the Senior Vice President and Chief Financial Officer (CFO) of W.W. Grainger, Inc. She oversees the company's financial activities, including controllership, treasury, financial analysis, investor relations, internal audit, tax and financial operations. She is also responsible for Grainger’s corporate strategy, analytics, real estate and the U.K. business. (Cromwell). 

Before becoming CFO in 2021, Deidra served as Senior Vice President and President, North American Sales and Services, responsible for sales, inventory management solutions, and customer engagement strategies in Canada, Latin America and the United States. She also served as Senior Vice President, Direct Sales and Strategic Initiatives, leading the U.S. sales team, pricing strategy and gross margin optimization. In 2017, Deidra developed and launched Grainger’s new pricing strategy, reinvigorating the company’s relationships with large and medium customers. Deidra joined Grainger in 2013, as Vice President, Finance, Americas, leading financial planning and analysis for Canada, Latin America and the United States. In this role, she launched the Grainger Procurement Company and led efforts to expand operating margins through improved expense leverage. 

Deidra is an accomplished leader with more than two decades of broad management, operations and financial experience. She started her career as an engineer and production leader at Eli Lilly and gained valuable accounting and M&A experience at PricewaterhouseCoopers. She held both general management and financial roles of increasing responsibility at Sears Holdings, departing as Chief Operating Officer in 2013. Over her career, she is known for delivering customer results and consistent top quartile performance. 

Deidra earned an MBA in Finance and Operations Management from Indiana University’s Kelley School of Business and a bachelor’s degree in Chemical Engineering from North Carolina A&T State University. She is also a graduate of the Executive Accounting Program at the University of Texas and a fellow of the CEO Perspectives and CFO Leadership programs at Northwestern’s Kellogg School of Management and the Harvard Business School, respectively.

Deidra currently serves on the board of directors of Weyerhaeuser Company, one of the world’s largest timberlands operators, as well as the Ann and Robert H. Lurie Children’s Hospital of Chicago. 

Rob Reynolds is the Senior Vice President, Branch and Distribution Center (DC) Operations, of W.W. Grainger, Inc. His geographically dispersed organization includes team members working at more than 250 U.S. branches and 21 distribution centers in the U.S., Canada and Mexico. He also supports Grainger’s U.K.-based Cromwell Group.  

With an emphasis on team member safety, best-in-class service and continuous improvement, these teams are focused on providing the products customers need to keep their businesses running and their people safe. 

Rob has deep expertise in fulfillment operations. He has held various leadership positions at Grainger since joining the company in 2008, including Vice President, Distribution Operations, Senior Director, DC Operations Excellence, Senior Director, Regional Distribution, and Director of Distribution. 

Prior to Grainger, Rob held leadership roles at Footsmart.com, a Division of Benchmark Brands, Inc., and Amazon.com. 

He is also a retired officer of the U.S. Army where he served as Armor Officer and later Military Police Officer. Some of his specific positions include: Armor/Mortar Platoon Leader, Military Police Company Commander, Regional Corrections Facility Manager, CID Battalion Executive Officer, Army Force Protection Officer-Pentagon Army Staff, and Deputy Provost Marshall. His highest rank achieved was Major, and he is a recipient of the General Douglas MacArthur Leadership Award. 

Rob earned a bachelor’s degree from The Citadel in Charleston, South Carolina, and a master’s degree from the Marine Corps University in Quantico, Virginia. 

Paige Robbins is Senior Vice President and President of the Grainger Business Unit of  W.W. Grainger, Inc. She oversees Grainger’s integrated commercial function which includes sales, customer solutions, marketing, customer strategy, merchandising and supplier management. Paige is also responsible for Grainger’s business subsidiaries in the U.S., Canada and Latin America.   

Before assuming her current role in 2021, Paige served as Grainger’s Senior Vice President, and Chief Technology, Merchandising, Marketing and Strategy Officer, where she held responsibility for developing strategy and building MRO and technology solutions for customers and team members. Her teams included the Grainger Technology Group, as well as marketing, merchandising, supplier management, customer and corporate strategy, analytics and customer insights. 

Earlier in her Grainger career, Paige served as Senior Vice President, Global Supply Chain, Branch Network, Customer Service Centers and Corporate Strategy, where she was responsible for all aspects of the customer experience, from order to delivery. This included managing the company’s distribution centers, branch network, customer service centers, inventory investment, transportation network, the overall design and capabilities of the fulfillment network and Grainger’s corporate strategy, analytics and customer insight teams.  

Paige joined Grainger in September 2010 as Vice President, Logistics Management.  

Prior to Grainger, Paige served as Partner and Managing Director at the Boston Consulting Group (BCG), where she specialized in industrial companies. She helped her clients with a broad range of issues, including growth, customer segmentation, pricing, profit improvement, supply chain and merger and acquisition strategies.  

Paige received bachelor of science and master of science degrees in industrial engineering from Stanford University, before earning an MBA from Harvard University. She is a fellow of the CEO Perspectives program at Northwestern’s Kellogg School of Management and is a member of the Board of Directors of C.H. Robinson Worldwide, Inc. 

Masaya Suzuki was named Managing Director, Endless Assortment Business in January 2020. His responsibilities include overseeing Grainger’s entire endless assortment portfolio, which includes the Zoro businesses.  

In 2000, Masaya joined MonotaRO as part of a joint venture between Sumitomo Corporation and W.W.Grainger, Inc. In 2012, he was named Director, President and COO of MonotaRO, and named Director, President and CEO in 2014. He has since led the company to achieve substantial revenue growth, expand its product offerings and launch new businesses in South Korea, Indonesia and India. Masaya became Director, Chairman and CEO of MonotaRO in 2024.

As part of the Grainger and Endless Assortment Leadership Teams, Masaya continues to focus on product expansion, new and existing customer growth, and driving more independence for Grainger’s Zoro operations. 

Brian Walker is the Senior Vice President and Chief Product Officer of W.W. Grainger, Inc. In this role, Brian leads the prioritization of Grainger’s technology investments including Grainger’s digital platforms, mobile solutions and the industry leading Grainger.com.  

Brian has held many roles of increasing responsibility at Grainger. Most recently, Brian served in technology innovation capacities including Vice President, Digital Architecture and Operations and President of Gamut.com.  Prior to that, while headquartered in London, England, he served as Vice President of Strategy and Marketing for Grainger’s Online Business with operations in Canada, Germany, Japan, South Korea, the United Kingdom and the United States.  Brian has also led teams responsible for corporate strategy, merchandising and pricing for the Grainger U.S. Business. He joined Grainger in September 2006 as Purchasing Manager.  

Prior to joining Grainger, Brian led teams in warehousing, logistics, supply chain and sales operations at McMaster-Carr Supply Company.  

Brian holds a bachelor’s degree in Economics from Wesleyan University, a master’s degree in Applied Statistics from DePaul University, and an MBA from the University of Chicago’s Booth School of Business. Brian serves on the Board of Trustees of the Illinois Institute of Technology, the Board Chair Executive Council and is on the Board of Advisors for IIT’s Institute of Design. He has served as a founding board member for Wesleyan’s Quantitative Analysis Center and is a current member of Wesleyan’s President’s Council. Brian also is a Lecturer at Carnegie Mellon University for their CIO and CDigitalO programs.