Executive Leadership Team

John Ruthven

John Ruthven

CEO and Managing Director

John Ruthven is an internationally experienced software industry executive respected 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. 

Most recently, John was the Operating Officer – Global Sales at TechnologyOne. Prior to that John was President & Managing Director ANZ of SAP, SVP International Sales at Zuora Inc, and held various senior positions at CA Technologies and Computer Associates Inc. John has extensive international experience in the USA, Europe and Asia Pacific regions.


Peter Adams

Peter Adams

Chief Financial Officer

Peter joined IR in March 2008 and is responsible for overseeing the Company’s finance and administration, including regulatory compliance and investor relations. Peter is a Chartered Accountant with over 25 years experience. He has held a number of senior accounting and finance roles, including seven years as CFO with Infomedia (an ASX-listed technology company), six years with Renison Goldfields (ex ASX top 100 Resources Company) and two years with Transfield Pty Ltd. Peter’s career began with Arthur Andersen, where he was responsible for managing large audit clients.


Stu Matthewman

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.


Vanessa Walker

Vanessa Walker

Chief People & Culture Officer

Vanessa joined IR in 2017. As Chief People & Culture Officer, Vanessa is responsible for IR’s people strategy. This includes attracting and developing world class talent to deliver innovative work for our clients, ensuring the business has the right leadership capability to enable growth and transformation, and investing in an inclusive, values-led culture that supports our people to be the best they can be. Vanessa started her HR career in technology when she joined Comverse Network Systems in 2000 and then went on to hold a number of senior HR roles in the technology and data sector, at companies including Experian, Sage Software and Hyperion Solutions.


Michael Tomkins

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.


Harrison Bliss

Harrison Bliss

SVP Customer Value

Harrison joined IR in November 2019 and is responsible for professional services and customer success, focusing on ensuring customers achieve their business objectives. Harrison has deep expertise in implementing and supporting business-critical technologies with a focus on customer outcomes, and he has over 25 years’ experience in global Telecommunications with both service providers and software vendors. Prior to joining IR, Harrison was Director of Global Professional Services at Synchronoss Technologies and has previously held leadership roles at Openwave Messaging, TelePacific Communications, Lucent, ICG Communications, and Tele-Communications Inc (TCI).


Dave Siebert

Dave Siebert

SVP Americas

Dave Siebert is a Technology Executive with over 30 years in the industry. In his career he has served in numerous positions including CEO, General Manager, SVP of sales, and SVP of Professional Services for companies including SAP, PeopleSoft, J.D. Edwards, Lawson Software, Verint, CIBER, and NetRegulus. Dave’s joined IR in August 2019 and in his role as SVP of America’s region he has P&L responsibility for the business and manages all the functions of the region. Dave received his BA in Business Administration from Bethel University and his MBA in Operations Management from DePaul University – Charles H. Kellstadt Graduate School of Business.


Jason Barker

Jason Barker

SVP APAC, MEA & Europe

Jason joined IR in October 2014 and leads the Asia Pacific, Middle East & Africa and European regions. Jason joins with 20+ years successful leadership experience in Technology, Media & Telecommunications with roles covering EMEA and APAC. Jason brings a track record of starting up, recruitment, development and leadership of regional teams, turning around operations, complex negotiations and growth within tight timescales. Prior to joining IR, he was Vice President Sales, Asia Pacific at Acision where, based out of Singapore, he was responsible for leadership of the Sales team across the region. Prior to this Jason spent 5 years in Australia leading Asia Pacific teams with Subex and Surfkitchen.