Executive Leadership Team

JR Final

John Ruthven

CEO and Managing Director

John is an internationally experienced software industry executive known for his strategic approach and operational expertise across global enterprises. John has over 20 years’ experience working in the technology industry with a proven track record of leadership and delivering strong profitable growth. His international experience spans across the USA, Europe and Asia Pacific regions. 


John joined IR in July 2019 to lead the next growth phase of the company. He plays a crucial role in steering the company through its transformational phase of being a ‘Software as a Service’ (SaaS) provider and is responsible for revitalizing the company’s operational strategy.  


Prior to that, John was the Operating Officer – Global Sales at TechnologyOne. Previously he has also held the position of President & Managing Director ANZ of SAP, SVP International Sales at Zuora Inc, and various senior positions at CA Technologies and Computer Associates Inc.  


 An avid cyclist, John loves to spend time outdoors.  

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Christian Shaw

Chief Financial Officer

Christian joined IR in January 2024 to lead the company’s Group Financials, Finance Planning & Analysis and Legal teams.

Christian has an extensive background as a senior finance executive, with a strong operational, commercial, and strategic focus. With over three decades of experience, his expertise spans multiple industries including insurance, technology, telecommunications, financial services and healthcare.

He was formerly CFO at AJG Australia Pty Ltd. Before that, he was the CFO at Multicom Resources, MOKO Social Media Limited and iCash Payment Systems.

Christian graduated with a Bachelor of Business from the University of Technology Sydney and is a Certified Practicing Accountant.


Stuart Matthewman

Chief Marketing  Officer

In his role as the Chief Marketing Officer, Stuart is responsible for the company’s global marketing and communications efforts.

He leads branding, digital marketing, content and social media, public relations and advocacy, demand generation, product and business development and field marketing. Stuart has a breadth of marketing experience of over two decades and has led global teams.

Stuart joined IR in 2018 and has risen through the ranks, with his last role being Global Head of Marketing Communications. Prior to that, he worked with Macquarie Telecom, AOL Online Services, Telstra Corporation and ANZ Banking Corporation. Stuart is passionate about triathlon and Australian Football and supports sport related charities.

Donna Williams

Donna Williams

Chief People Officer

At IR, Donna leads the People function with an aim to further strengthen the culture.  She is responsible for the company’s global HR strategy, including workforce development, talent management, leadership/management development, organisational effectiveness, and employee engagement.  

Having joined in December 2022. Donna brings to IR two decades of HR experience across Australia, Asia, the Americas, and Europe.  She has worked across HR disciplines including HR Operations, Capability Leadership, Organizational Development, Business Expansion, Workforce Strategy, Performance Development, Compensation and Benefits, Culture & Talent Management, Health & Safety.

In the past, Donna has held global leadership roles with medium to large multi-national publicly listed companies in multiple industry sectors including information technology and software, mining and resources, oil and gas, and aviation.

Donna has an executive master’s in Business Administration and a graduate diploma in Project Management.


Michael Tomkins

Chief Technology Officer

Michael joined IR in September 2018 and is responsible for leading the development and product management teams.

Michael has deep expertise and a proven track record in building cloud platforms at scale, and is also a cyber security expert.

Michael was formerly CEO of Deluxe Media Cloud and was CTO of FoxSports for 5 years where he transformed the business from an ‘iron and airwaves’ broadcaster of premium sports content, to a fully digital cloud-based service, delivering a flawless experience to millions of viewers.

Jason Barker Grey

Jason Barker

SVP International Business

Jason joined IR in October 2014 and leads the EMEA & APAC geographies. He brings more than 20 years of leadership experience in software and technology, focused on growing markets across both the enterprise and service providers. He has had a strong track record of starting up, recruiting and developing regional teams along with turning around operations, complex negotiations and growth within tight timescales.  

Before joining IR, Jason was Vice President of Sales, Asia Pacific at Acision, a PE backed technology company headquartered in EMEA. Based in Singapore, he was leading Sales teams across the region. Prior to that, he has held several Sales leadership roles in the UK and Australia. 

He enjoys football and swimming. 

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Marco Cantamessi

SVP Americas

Marco joined IR in August 2023 to lead the Americas region. He brings to the company over 20 years of global and diverse leadership experience across sales, operations, and finance. Having held a wide range of management roles previously, Marco’s focus at IR is to grow and strengthen the Americas region.

Prior to joining IR, Marco led EfficientIP's Americas operations where he transformed the organization from a perpetual license model to a software subscription and SaaS based company, driven through channel sales. Marco also had an extensive career with NTT (previously Dimension Data) having led teams of 200+ people in the US, South America, and Europe.

Marco has an MBA in IT and Project Management. He considers himself a lifelong learner and has completed executive education, leadership and technology programs from Stanford, Harvard, and MIT Sloan School of Management in more recent times.


Having lived and worked in four different countries and two continents, Marco is fluent in English, French and Spanish. When he’s not working, Marco has a passion for cooking and enjoys playing tennis whenever he can.