Ralph Highnam, PhD Oxford


BSc (Hons) 1st Class, MSc, PhD

Ralph, a founding director of VHT, has been at the forefront of the digital breast imaging field for over 25 years. Initially a research scientist at the University of Oxford, Ralph’s innovative work in quantitative breast imaging technology led him to form first OXIVA Limited and then Mirada Solutions with Professor Sir John Mike Brady. Under Ralph’s leadership Mirada became the number-one provider of image registration and fusion tools before being acquired by CTI Molecular Imaging Inc. and later Siemens Medical Solutions USA, Inc.

Before founding VHT in 2009, Ralph consulted for many of the world’s top medical imaging companies, including R2, Siemens, Hologic and Dexela, as well as many leading breast screening programs. During this time, he continued his academic research as part of an international circle of collaborators.

Ralph is the author of numerous articles and, with Brady, the seminal book Mammographic Image Analysis. As CEO of VHT, Ralph is dedicated to providing the most accurate measurements possible of breast composition (“breast density”) in order to improve the health outcomes of women around the world. Based in Wellington, New Zealand, in 2015 he was named a Wellingtonian of the Year finalist.


Mark Koeniguer

Chief Commercial Officer & President, USA


Mark is a medical industry executive who has led companies in the medical imaging, software and medical device space for over 27 years.

Mark has extensive commercial experience working with both start-up and established companies, leading high-performance teams and launching new products in domestic and international markets. Mark started his career at GE Healthcare and took on roles of increasing responsibility in marketing and sales, operations and finance. His executive global leadership roles include those at Cardioptimus, Estech, Ziosoft, R2 Technology and Stereotaxis.

More recently, Mark was Chief Commercial Officer at UL Workplace Health and Safety, a global leader in e-learning and electronic medical record software supporting the occupational healthcare industry. He is based in Nashville, Tennessee.

monica saini

Dr Monica Saini

Chief Medical Officer


Monica joined the VHT Board in 2018. She is an internationally recognised expert in breast cancer, especially breast density and breast cancer risk assessment.

Monica is a Doctor of Medicine and a prior BSc in nursing. She has had U.S. radiology training and an additional fellowship in women’s imaging. She has over 10 years of patient care experience and was the Chief of Breast Imaging at Santa Fe Imaging/Christus St Vincent Hospital in the southwestern U.S. from 2008 to 2016. She also served as the chairman for the Christus St Vincent Cancer Committee.

In 2015, she became a medical advisor for GE Healthcare and consultant for ProScan Imaging, as well as research advisor for World Care Clinical. By 2016, she was appointed Medical Director of Automated Breast Ultrasound Systems, GE Healthcare. Globally, she worked on early detection of breast cancer, breast cancer research, and international physician education for breast imaging technologies.

Monica relocated to New Zealand in 2017 and started as a consultant for VHT where she implements hands-on expertise in product development, research, and customer relations. She also evaluates patients as a lead radiologist at Hutt Valley District Health Board in Wellington.


Craig Hadfield

Chief Financial Officer

H.Dip.Acc (Hons)/CA(SA)

Mr. Hadfield brings over eight years’ experience in senior and managerial auditing roles at large accounting firms including EY and Deloitte. He was most recently an Associate Director for Deloitte Wellington and was the Audit Manager for VHT during the IPO process. Previously, he held roles internationally, including in the US, South Africa, New Zealand, and the Bahamas.

Craig is a registered member of the South African Institute of Chartered Accountants (SAICA) and an affiliate of NZICA (CAANZ). He is based in Wellington, New Zealand.


Gareth Beaumont


BE, NZCE Electrical Engineering

Gareth has 22 years' of experience and exposure to a wide range of IT systems, frameworks and best practices. His core background in software architecture has equipped him to deal with today's cloud technologies and associated emerging technologies with a security driven development and environment focus.

Gareth has worked in the UK and Germany, and is now based in Wellington, New Zealand.


Julian Marshall

Chief Strategy Officer


Julian is a breast imaging expert of 30 years’ experience whose breadth of knowledge spans all major areas of the medical imaging industry.

Initially a software developer and consultant for Sun Microsystems, Julian ran Alpine Image Systems for 8 years before joining companies like R2 Technology, acquired by Hologic in 2006. At R2 and Hologic he held leadership roles in software and hardware development, marketing and product management. In this last capacity he continued his work in product innovation for Hologic, where he served in several director-level positions. He led the team responsible for managing all of Hologic’s breast imaging products, including tomosynthesis, before moving to Hologic’s Global Strategic Innovation group.

An engineer by training, Julian holds numerous patents in computer-aided detection and breast imaging, including user interface design, and has worked in cardiac ultrasound, digital subtraction angiography, image processing and mammography. He is based in San Francisco, California.


David Mezzoprete

Business Development Manager

David has nearly 30 years of sales experience in the medical imaging field, specifically in breast imaging and channel sales.

Before joining VHT’s management team in 2012, David served as Vice President of Channel Sales for Carestream Health, where he was responsible for channel sales for digital imaging equipment and x-ray film in the US. Previously, he held sales positions with Fuji Medical Systems USA and R2 Technology, the breast computer-aided detection company. He is based in Rochester, New York.


Richard Hudson

VP Engineering and Service Delivery


Richard has over 30 years’ experience working in software product development in the hi-tech sector; most notably with Imagination Technologies, a UK based company that pioneered the PowerVR 3D graphics technology, adopted by global companies such as Compaq, NEC, Sega and Apple. During his time at Imagination, Richard held the roles of VP Software Engineering for PowerVR and Senior Director for Imagination’s cloud-based SaaS products and services.

Richard is used to working with technology companies that are transitioning from startup to growth mode. He is based in Wellington, New Zealand.


Penelope Gibson

Intellectual Property Manager

BA (Jt Hons), MSc, PhD

Penelope is an expert in intellectual property law and practice. She qualified after working as a technical author and translator (electronics) and business development manager (appraising technology and intellectual property in Eastern Europe), and as director in the UK's largest independent intellectual property rights management group, pioneers of new models for monetarisation of intellectual property.

Since 2003, Penelope has worked with high-growth technology companies, research organisations and investors in Europe, the US, Russia, China, Australia and New Zealand, advising on cost-effective protection and use of intellectual property for international growth.

Penelope has been listed among the world's top strategists (IAM) and her work has been cited by the UK government as “best practice” (Gowers Review). She has been a regular speaker at APEC forums, has advised governments and national patent offices on intellectual property policy and her materials are used in universities in the US and China. Her professional memberships include Licensing Executive Society International, Chartered Institute of Linguists (for technical Russian) and the Royal Society (New Zealand). Penelope has consulted for VHT since 2009. She is based in Bordeaux, France.