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Our leadership team

Executive Leadership Team

Jens Montanana

Executive Chairman

Read bioJens is the founder and principal architect of Datatec, established in 1986 and Westcon-Comstor’s parent company. Between 1989 and 1993, Jens served as Managing Director and Vice-President of US Robotics (UK) Limited, a wholly owned subsidiary of US Robotics, Inc. which was acquired by 3Com in 1997. In 1993 he co-founded US start-up Xedia Corporation, which was subsequently sold to Lucent Corporation in 1999. In 1994 Jens became Chairman and Chief Executive Officer of Datatec. Jens graduated with a degree in Electronic Engineering from the University of Reading.

David Grant

Chief Executive Officer

Read bioDavid has three decades of experience in channel business leadership and distribution, including sales, marketing, investment and executive roles. Most recently David served as the company’s COO and EVP Global Partner Sales & Operations. He joined Westcon-Comstor in 2008 through the acquisition of the venture capital backed distribution business, Crane, where he was CEO. Prior to this he held a number of sales and leadership roles at Canon. David’s credentials include a BSc, Brunel University and the Senior Executive Programme at Henley Management College.

Callum McGregor

Chief Financial Officer

Read bioWith more than a decade in the Datatec Group finance, Callum now serves as Chief Finance Officer for Westcon-Comstor International. Joining Westcon-Comstor International in 2014 as Services Director of Finance, he has also held roles of Vice President of Finance for Cloud and Vice President of Group Finance & Operations. Callum began his career with Deloitte, South Africa, qualifying as a member of the South African Institute of Chartered Accountants. Callum is also qualified as a Certified Information Systems Auditor and holds international affiliate membership with CPA Australia and the American Institute of Certified Public Accounting. He holds a BComm degree from the University of Johannesburg.

Sales Leadership Team

Willem J. H. de Haan

Executive Vice President Comstor Europe & Comstor International

Read bioWillem previously led the company’s Westcon Security Division in EMEA, restructuring its portfolio and go-to-market, bolstering sales and optimising returns, combined with area leadership of our entire Central European region covering both Westcon and Comstor subsidiaries. He comes to Westcon-Comstor after serving as EVP at the data communications, security, systems and storage distribution business at Landis Group, and held leadership roles at both Getronics Group and A-line Technologies. His advanced education includes a BBA in Commercial Technology from Nyenrode Business University and a BSc from the Eindhoven University of Technology.

René Klein

Executive Vice President Westcon Europe

Read bioBased in Houten, Netherlands, René leads the Westcon business across Europe. Since joining the company in 2007 from Crane Telecommunications, René has held a series of country and regional sales leadership roles that include Westcon Convergence in Benelux, France, DACH and Eastern Europe, as well as Westcon-Comstor group in northern Europe. René has previously held leadership roles in VolkerWessels and Distritel, a Dutch value-added distributor. René is a graduate from the Rotterdam University of Applied Sciences.

Patrick Aronson

Executive Vice President, Westcon-Comstor Asia Pacific

Read bioPatrick is responsible for the company's business performance across south-east Asia, Greater China, Japan, Korea, Australia and New Zealand. Previously Vice President of Asia, he was responsible for growing the region's Comstor, Westcon Security Solutions and Services businesses. Prior to joining, Patrick spent a decade leading Motorola's mobile business in south-east Asia. He also spent five years as Managing Director at Brightstar where he developed its engagement strategy and mobility business. Patrick has a bachelor's degree in Economics and Asian Studies from Hobart College, New York, and is fluent in Vietnamese and Thai. Patrick also serves as the company’s Chief Marketing Officer.

Rakesh Parbhoo

Senior Vice President, Westcon-Comstor Sub Saharan Africa and Middle East

Read bioRakesh is responsible for the company's strategy and business performance across Sub-Saharan Africa and the Middle East. Prior to joining, Rakesh spent almost two decades in executive leadership roles across emerging markets at Dimension Data. Rakesh graduated with a BComm degree from the University of the Witwatersrand and completed a management development programme from Manchester University and an executive leadership programme from the Gordon Institute of Business Sciences. Rakesh is also Chief Technology Officer.

Simon Thompson

Senior Vice President Global Accounts, Westcon-Comstor

Read bioSimon has been with the business since 2002, holding a series of senior roles including Managing Director of Westcon UK, before heading up our global business for the last seven years. As SVP Global Accounts he is responsible for a team focused on providing international deployment solutions for global service providers and systems integrators.

Westcon International Leadership Team

Rakesh Parbhoo

Chief Technology Officer

Read bioRakesh is responsible for the company's commercial strategy around partner-facing digital solutions and digital distribution capability. Prior to joining, Rakesh spent almost two decades in executive leadership roles across emerging markets at Dimension Data. Rakesh graduated with a BComm degree from the University of the Witwatersrand and completed a management development programme from Manchester University and an executive leadership programme from the Gordon Institute of Business Sciences. Rakesh is also Senior Vice President, Westcon-Comstor Sub Saharan Africa and Middle East.

Dwight Pitter

Chief Information Officer

Read bioAs CIO, Dwight is responsible for design and deployment of company-wide technology systems. Since joining in 2015, he has led our digital transformation and has been fundamental to the development of our digital distribution platforms. Dwight possesses 20 years of commercial experience across global enterprise solutions, e-commerce platforms, order management and CRM. He holds a degree in Computer Science from Southern Connecticut State University.

Patrick Aronson

Chief Marketing Officer

Read bioPatrick leads Westcon-Comstor’s global marketing organisation which is responsible for driving company growth and partner success. With a focus on analytics, marketing automation and digital tools, Westcon-Comstor marketing is helping our technology vendors and channel partners succeed in a world increasingly driven by subscription and as-a-service business models. Patrick is also Executive Vice President for Asia Pacific where he leads an award-winning sales and marketing team responsible for both Comstor (Cisco) and Westcon security, networking and cloud practices. Prior to joining Westcon-Comstor, Patrick spent over a decade leading Motorola's mobile business in south-east Asia. He also spent five years as Managing Director at Brightstar where he developed its engagement strategy and mobility business. Patrick has a bachelor's degree in Economics and Asian Studies from Hobart College, New York, and is fluent in Vietnamese and Thai.

Donna Bain

Senior Vice President, People and Development

Read bioDonna joined Westcon-Comstor in 1997 and is responsible globally for people and development. Her career has evolved with the business; previous roles include Finance Manager, Personal Assistant and Marketing Events Manager before moving into Human Resources. She specialises in coaching and mentoring and is trained in hypnotherapy. Prior to joining Westcon-Comstor, Donna was a Senior Auditor with the RAF.

Kevin Brzezinski

Senior Vice President Operations

Read bioKevin is responsible for strategic direction and execution of operations strategy across our international business. Previously Vice President of Operations in Westcon North America, Kevin has held a number of supply chain, logistics and distribution services leadership roles. Prior to joining Westcon-Comstor in 2012, he was director of Worldwide Operations for Lexmark. He holds an MBA and BSc from the Indiana Institute of Technology.