Our Leadership
Making the world more sustainable, safer and smarter for the future is a team effort.
Our leadership team are passionate about making a difference and unlocking the value of location data.

Claire Milverton
Chief Executive Officer (CEO)Claire Milverton
Chief Executive Officer (CEO)Claire has been CEO of 1Spatial since January 2017 having previously been the CFO.
Claire is passionate about leading and working collaboratively; making the best of her team’s skills to create a great organisation and a positive culture - extending this approach to all other stakeholders including customers and partners.
Claire is also passionate about Innovation and Data. Since being the CEO, Claire has championed the Innovation Process both internally with employees but also externally with customers. Claire believes that working collaboratively with clients and using some of 1Spatial’s leading tools such as 1Integrate is a great way to create new innovative solutions. Currently, Claire is championing a number of key innovation programmes within the organisation including 1Integrate 3D, 1Water (Esri based solution), Supply Chain Data Management (1Data Gateway) and Artificial Intelligence based solutions.
Having worked in finance, Claire is no stranger to issues in relation to poor quality data and recognises the importance of getting an excellent return on the data investment. She is a great believer in good data governance and building innovative solutions that can then capitalise on the high-quality data underpinning the solution.
Claire has had a significant number of years in the technology sector from both her time working within 1Spatial and through her experience at PwC where she was a technology specialist. Claire is a qualified Chartered Accountant.

Andrew Fabian
Chief Financial Officer (CFO)Andrew Fabian
Chief Financial Officer (CFO)Andrew joined the Board as Interim Chief Financial Officer in June 2020 and transitioned into CFO in October 2020. Andrew was previously Group Finance Director of StatPro Group plc, a leading provider of cloud-based portfolio analysis software solutions, until its recent successful acquisition by Confluence Technologies, Inc. in 2019. Through his time at StatPro, Andrew experienced the transformation from an on-premise offering to a cloud platform, overseeing the expansion of the business both organically and through acquisition in the UK and internationally, and delivering a significant increase in shareholder value.
Prior to joining StatPro, Andrew held senior financial roles at William Baird plc, De La Rue plc and Deloitte. Andrew is a Fellow of both the ICAEW and the Association of Corporate Treasurers. In 2012, Andrew was awarded a ranking in the ‘Hot 20 FDs’ in the TMT sector by BDO LLP and was a winner at the Finance Monthly CFO Awards in 2017.

Seb Lessware
Chief Technology Officer (CTO)Seb Lessware
Chief Technology Officer (CTO)With a degree in Cybernetics and Computer Science, Seb joined Laser-Scan (which became 1Spatial) in 1997 as a Software Engineer. After working on many projects and a broad range of software as a Senior and then Principal Software Engineer, he then moved into Consultancy and then Product Management which provided insight into customer and industry needs and trends.
After leading Product Management for a number of years, Seb is now Chief Technology Officer (CTO) at 1Spatial.

Bob Chell
Chief Product Officer (CPO)Bob Chell
Chief Product Officer (CPO)Bob joined Laser-Scan (which became 1Spatial) in 1998, and his main goal has always been to understand how to create products and solutions that maximise the value that 1Spatial can deliver to its customers. In doing this, Bob looks to understand the patterns behind creating valuable products, and the processes that support great solution delivery.
His primary areas of interest are in harnessing cognitive diversity, rules-based patterns, data modelling, geospatial data management, quantitative data quality management techniques and spatial data infrastructures.
After 15 years of delivering products and solutions to 1Spatial's customers in all industry sectors, Bob moved to head up the Consulting team, bringing the group operation together with project management, group direction, architecture and agile methodologies.
In 2018, Bob became COO at 1Spatial. He is also 1Spatial's Chief Product Officer.

Jonathan Shears
Managing Director, 1Spatial Group Limited, UK and IrelandJonathan Shears
Managing Director, 1Spatial Group Limited, UK and IrelandAs Managing Director for 1Spatial Group Limited and passionate about geospatial technologies, Jonathan has worked extensively with satellite and aerial imaging platform companies including Airbus and Telespazio. Formerly a defence map research officer at the UK Ministry of Defence, he has worked for nearly 35 years in commercial sales including photogrammetric software, cartographic services and hosted solutions.
Before joining 1Spatial in Cambridge, Jonathan worked in Earth Observation specialising in remote sensing, using machine learning to extract intelligence analytics for financial intelligence clients from high resolution imagery and data wrangling.
Jonathan brings a real enthusiasm for providing geospatial data systems and solutions to 1Spatial’s customers and is excited about the significant opportunities for Location Master Data Management solutions in an emerging global data economy.

Sheila Steffenson
CEO, 1Spatial Inc, USASheila Steffenson
CEO, 1Spatial Inc, USAAs CEO for 1Spatial Inc. (Americas), Sheila has over 30 years’ experience in the geospatial industry, 23 of which were with Esri Inc. During her years there she moved from the initial role of technical/technical sales into management, taking on the role of Regional Manager of the South Central US Esri office. Following 11 years in that role she moved to the Washington DC area and took over management of the Federal Sciences Sales team. During her tenure she also supported numerous international efforts, including support to Esri’s Latin American distributors and support of various open geospatial events around the globe.
Sheila brings great excitement to the support of developing out implementations of the 1Spatial capabilities across the Americas. Recognizing the intrinsic value 1Integrate brings to the enterprise of data systems (both geospatial and non-geospatial), she finds great satisfaction in enabling data managers with capabilities to more efficiently and effectively ensure that their data is “fit for purpose”.

Issam Tannous
Managing Director, 1Spatial France, Belgium and TunisiaIssam Tannous
Managing Director, 1Spatial France, Belgium and TunisiaIssam is the Managing Director of 1Spatial France, Belgium and Tunisia.
Holding a PhD from the Paris University in physics and remote sensing, Issam started his career within Airbus as an R&D Engineer in the area of earth observation image processing. He then joined Thales where he was a Project Manager and then a Department Manager working on geospatial and imagery information systems dedicated to intelligence and cartographic applications with clients in the Defence and Mapping sectors.
After 7 years with Thales, Issam worked with Cap Gemini for 1 year to initiate a GIS division and then shortly took the role of COO at STAR-APIC, a Belgo-French SME offering GIS business software for Government and Utilities. He was the CEO of STAR-APIC when 1Spatial carried out the acquisition of the company in 2013. Following the acquisition, Issam became the Managing Director of 1Spatial France and Belgium.
In 2019, along with the 1Spatial CEO, Issam led the acquisition of Geomap-Imagis, a French company with a subsidiary in Tunisia. This acquisition was key to the growth strategy of 1Spatial and Issam is running the resulting integrated business in France and Belgium.
Issam brings to 1Spatial a large range of experiences gained during his career, working with large Groups and SMEs, addressing public and private sectors and always dedicated to the geospatial sector.

Andrej Mocicka
Country Manager AustraliaAndrej Mocicka
Country Manager AustraliaAndrej has been involved in the Spatial Industry since 1979. He started at the Melbourne and Metropolitan Board of Works where he was involved in a variety of survey activities from Minor and Major Construction, Geodetic, Cadastral, Topographic to name but a few.
In 1983 he undertook the Bachelor of Applied Science (Surveying) at the RMIT. Upon completing the course (with Distinction) in 1986 he commenced Post Graduate studies in Land Data Management at the RMIT University.
In 1991 he commenced employment with TOPCON Australia becoming the state manager for Victoria and Tasmania.
In 1995 Andrej joined LISTECH until the end of June 2018. In his time at LISTECH, Andrej was involved in all aspects of the business from establishing and managing the Leica Geosystems agency from 1995 to 2000. To providing Support, Business Development, Sales and Marketing Management for LISTECH's product range.
Currently with 1Spatial Australia, starting in July 2018 as the Sales Manager and now the Country Manager since Feb 2020.
Andrej has also had a long and active association with the Spatial Industry on a professional level. Being on the committee of the Institution of Surveyors Victoria Division from 1992 to 2003. He served as President of the division in 2000 and became a Fellow of the Institution of Surveyors Australia in 2001.
Andrej is a foundation member and Fellow of the Surveying and Spatial Sciences Institute (SSSI). Has served on the SSSI National and Victorian SSSI Land Survey Commission since 2006 until July 2018 and is on the Victorian committee since 2018 and currently the chair of the Victorian division.

Simon Chinnock
Group Financial Planning AnalystSimon Chinnock
Group Financial Planning AnalystSimon initially had roles outside of finance, working in IT, Retail Management and the Motor Trade. He has worked within finance for the past 26 years (the last 10 years in FP & A roles) working in roles as diverse as product management and AR Manager. Prior to joining 1Spatial in 2018 as Group Financial Planning Analyst he worked for Zurich Insurance, Caterpillar Inc, Cummins Inc and Marshall Aerospace and Defence. During his time with Caterpillar Inc he was trained as a 6 Sigma (continuous improvement methodology) Black Belt and credited with $2.5m of savings. Because of Simon’s varied career he is very focused on practical solutions to business problems within a framework of processes and data driven decision making.

Julia Dutton
Global Head of MarketingJulia Dutton
Global Head of MarketingJulia joined 1Spatial in 2021, having held numerous marketing roles across a range of industries, including Head of Marketing at a cyber security firm in Cambridgeshire (England, United Kingdom).
In her current role as Global Head of Marketing, Julia works across each country team to ensure our marketing campaigns and content deliver at both a local and international level.
Julia has extensive experience in digital and content marketing and is passionate about finding opportunities to amplify the 1Spatial brand.
She loves getting to the bottom of our customers’ drivers and creating content that resonates with their unique needs.
She is enthusiastic about 1Spatial’s future and proud to be part of a team of talented and committed marketing professionals.

Jess Sims
Global Head of HRJess Sims
Global Head of HRJess has worked in a variety of roles within the HR team at 1Spatial since joining in March 2016. With a Masters in Human Resources Management, Jess is passionate about employee wellbeing and creating positive working environments. Before joining 1Spatial Jess worked across a variety of industries including education and local government. In her new role supporting HR across our different countries she is looking forward to establishing best practices and new links between our employees.

Richard Weiss
Chief Commercial OfficerRichard Weiss
Chief Commercial OfficerRichard assumed the newly created role of Chief Commercial Officer (CCO) of 1Spatial PLC in November of 2021 and is responsible for helping improve 1Spatial’s performance across all of its business units. Richard was trained as a cartographer and brings with him 30 years of diverse professional experience in the geospatial field. Fifteen years of that time was spent at Esri Inc. (where he worked with Sheila Steffenson, the current 1Spatial Inc CEO) and Esri UK where he had a variety of roles, including managing ESRI UK’s product development and international business development; before moving on to Switzerland to manage Geocom’s (now VertiGIS) product management team. Richard was subsequently the general manager of 3-GIS’s European affiliate, responsible for its EMEA operations.
Richard’s specialities include managing implementations and sales teams and business management - with a particular focus on geospatial solutions for the utilities and telecommunications sectors. Richard is a lifelong believer in and practitioner of the value of spatial data and spatially-enabled systems of record and engagement.

Warren Gilmour
Global Partner ManagerWarren Gilmour
Global Partner ManagerWarren joined 1Spatial in April 2021 as Global Partner Manager responsible for managing and building an ecosystem of partners to support and complement 1Spatial’s strategy and core expertise.
Before joining Spatial he spent ten years with IBM in their One Channel organisation. At IBM he managed traditional hardware and software resellers, Global System Integrators as well as Managed Service Providers. Although all three roles involved working closely with partners, the partnerships in all three divisions presented diverse needs and challenges. Warren believes that truly understanding the needs and drivers of different partners are key to ensuring the success of any partnership.
Outside of work he loves sport. In the past he played cricket for Zimbabwe B and represented the Zimbabwean hockey team at the All Africa games. He has played competitive cricket against India and Pakistan but nowadays enjoys playing hockey at a much slower pace, as well as doing scuba diving and running in his free time.