Sirius has been established by four highly experienced practitioners with a track record in leading, delivering and overseeing defence related tasks:

David Bangert, Tom Baldwin, Carl Dalton, Jo Llewellyn.

David and Carl were the owner-Directors of Polaris Consulting Limited, a highly successful consultancy which traded from 2001 to 2017. When Polaris was acquired by TP Group, both of them became Partners in its Consultancy and Project Services (CaPS) division. Jo Llewellyn was Chief Technical Officer for Polaris, and became Practice Lead for Systems Engineering within CaPS when it was acquired by TP Group. Tom Baldwin formerly worked for Polaris Consulting and most recently worked for NATO Allied Command Transformation (ACT) in the Operational Analysis / Analysis of Alternatives Branch.


David Bangert Profile PictureDavid Bangert has accumulated more than 25 years’ experience in the leadership, management and execution of Government projects. He has an up-to-date understanding of HMT guidance on Business Case development, and has spent the past 10 years leading the approvals for, and development of the Value for Money (VfM) cases, for some of the largest and highest profile Government projects, in the range of £’00Ms to £10Bn+. David has expertise in Operational Research and has used this to develop analysis programmes to support the assessment of VfM for nuclear and defence projects. He has particular expertise in the design and facilitation of structured workshops to develop benefits, opportunities and costs (financial and non-financial), combining qualitative and quantitative techniques to drive cost-benefit and cost-effectiveness analysis. David has led innovative research projects, successfully delivered studies into future energy security, defence inflation, recycling and re-use and rapid manufacturing techniques for UK Government and industry, and has delivered successful outcomes for Head Office, DE&S, ISS, Dstl and the Defence Industry. In December 2020 David was awarded a military history doctorate from the University of Portsmouth.


Tom Baldwin Profile PictureTom Baldwin has over 15 years’ operational research and analysis (OR&A) experience, predominantly applied to defence research, capability development and acquisition within government, the private sector and multi-national environments. He has experience of designing and applying multi-method analysis, modelling and experimentation approaches to projects throughout the capability development lifecycle. This has included leading multi-disciplinary teams to develop and test new concepts, conduct cost-effectiveness analysis in support of acquisitions and run experiments in support of urgent operational requirements. Tom has extensive Joint/C4ISR experience and has also worked in the Land, Maritime and Air domains. Tom’s recent work had predominantly been leading Analysis of Alternatives (AoA) tasks as part of NATO’s new Common Funded Capability Delivery model, which included the Chief Analyst role for a significant Air C2 project. He has a keen interest in applying innovative analytical methods to solve defence problems. Tom is an active Fellow of the UK Operational Research Society (FORS) and frequently presents at OR&A conferences.


Carl Dalton Profile PictureCarl Dalton is a highly experienced cost analyst with over 45 years of related experience; of which the last 35 years’ has been spent conducting studies and leading tasks for Government. He is a Fellow of the Association of Cost Engineers and has been the Maritime and Costing Technical Lead since the commencement of the UK Analysis Support Construct (ASC). In this role, he has overseen and assured over 75 costing tasks and studies, ranging from the costing of a wide range of defence assets, through tasks for the Department of Transport and costing of infrastructure. Carl was one of the two owner-Directors of Polaris Consulting Limited, a highly successful consultancy which traded from 2001 to 2017. When Polaris was acquired by TP Group, he became one of the Partners in the Consultancy and Project Services (CaPS) division, with a turnover of over £20M.


Jo Llewellyn Profile PictureJo Llewellyn has over 20 years’ experience providing systems engineering consultancy and the delivery of OR tasks. Jo was Chief Technical Officer for Polaris and became Practice Lead for Systems Engineering within CaPS when it was acquired by TP Group. She has experience at the business and system design level, including planning and oversight of work programmes undertaken by multi-disciplinary and consortium-based development teams. As well as strong technical leadership and project management she has complementary skills in the areas of requirements engineering, technical assurance, stakeholder engagement, systems of systems analysis, enterprise architecting, and technology and standards assessment. She is currently working on projects in the nuclear and space sectors.


Nicola Jinman Profile PictureNicola Jinman is a Commercial Contracts specialist, with almost 30 years’ of experience gained across Procurement and Sales domains. Having worked extensively in an international business context, across Defence, Government, Nuclear, Aviation and Space Telecoms, Nicola has been accustomed to operating in multi-cultural and diverse teams. Due to her foreign language ability, Nicola has also had the opportunity to spend several years working in France for a leader in the Space Telecoms sector.


Darrell Hannam Profile PictureDarrell Hannam has over 20 years’ experience in defence as an expert in Command, Control, Computers and Communications, Intelligence Surveillance and Reconnaissance (C4ISR); gained as a Royal Navy Fleet Air Arm Observer on multiple platforms including Royal Air Force assets and a Qualified Weapons Instructor ISR. He has had a broad career encompassing tours on RN and RAF Squadrons conducting UK, Coalition and NATO tasking, developing Doctrine and Tactics, Techniques and Procedures and running an Operational Analysis and PED Cell at the Maritime Warfare Centre (MWC) and as a targeteer at PJHQ. Since leaving the Royal Navy Darrell has managed ASC, ASTRID, HSSRC and SERAPIS Frameworks and delivered consultancy tasks in the maritime and air domains for Dstl, MWC, NCHQ, Air Command and the Rapid Capabilities Office. Darrell is additionally trained as an APM PMQ and a SAFe 5 Agile Practitioner.


Dave Hedley Profile PictureDave Hedley is an accomplished principal consultant with over 35 years’ experience in the successful management and delivery of technical projects to government and industry organisations. Since 2000 he has provided cost focussed analysis, project and business case support to a broad range of clients in the defence and industry sectors. These include leading several cost modelling studies addressing the through life aspects of system ownership from conception to disposal and including the capture and management of project risks and opportunities and the characterisation and realisation tracking of benefits. He has worked closely with the MoD Cost Assurance and Analysis Service (CAAS) on many studies, is a committee member of the Society for Cost Analysis and Forecasting and a long-time contributor to the Team Defence Information Supportability Modelling and Analysis Working Group. He has expertise in the design, implementation and use of modelling solutions to support the capture of benefits, risks, opportunities and costs (financial and non-financial), combining qualitative and quantitative techniques to drive cost-benefit and cost-effectiveness analyses, complemented by a comprehensive understanding of the verification and validation of models.


Mikey Rogers Profile Picture

Mikey Rogers is an expert in statistics, mathematical modelling and stochastic processes, along with understanding risk and uncertainty and how uncertainty complicates decision-making processes. He has experience in simulating real-life phenomena in code, including Monte Carlo simulation. He is a recent graduate analyst who has experience conducting both data analysis and mathematical modelling to solve problems. He possesses a range of analytical and statistical skills, which are complemented by his analytical software skills.


Matt Harrison has over 20 years’ experience in leading operational research and systems analysis activities, predominantly conducted on behalf of UK Government. Matt has worked on a wide range of projects and has a solid understanding of the need for, and benefits of, analytical and technical support throughout the capability lifecycle. Matt has particular expertise in combining quantitative and qualitative analyses to provide evidence and insights in support of complex decisions, often made under high degrees of uncertainty and with the need to balance different stakeholder requirements and perspectives. In particular, Matt has wide experience of applying structured engagement to conduct benefits analysis, define requirements, assess alternatives and to understand, model and predict system behaviours and outcomes in the context of potential future situations. Whilst at UK MOD, Matt worked extensively on both research and acquisition projects, typically in the Air/C4ISR domain. He is experienced in generating evidence for MOD Business Cases and is familiar with current Government Approvals guidance and processes. Matt enjoys working in culturally diverse teams and has frequently collaborated with international partners. His experience includes 18 months at the NATO Joint Force Command in Naples and a number of years as the UK Technical Lead for international activities related to future combat air.


Katie Bramwell PicKatie Bramwell is an experienced operational analyst who has delivered multiple analysis projects in support of capability development and defence acquisition. Katie has a Master of Mathematics with first class honours and is experienced in OA techniques including wargaming, simulation, statistical / data analysis, option analysis and Tactical Reconstruction (TACREC). Her strong analytical skills have been applied across Maritime, Air, Land and Information domains for stakeholders up to 4* level for both the Ministry of Defence and NATO. In her previous role at the Maritime Warfare Centre, Katie established and led a TACREC team, providing timely and relevant geospatial analytical outputs to the front line to enable training and tactical development.



Sam Andrews has joined from his most recent role as an Operational Analyst at the Maritime Warfare Centre. Graduating from the University of Portsmouth with a Masters in Logistics & Supply Chain Management; Sam has gathered a vast amount of experience throughout his career. Projects have varied from producing OA solutions for the Navy, to the design and development of AI algorithms for autonomous vehicles.


Colin Kendall is a highly experienced Operational Analyst and Algorithm Developer with a long track record of impactful delivery in support of government and industry programmes. He has knowledge and experience of a wide array of soft and hard OA skills and analytical approaches. Colin has led and delivered multiple projects across the Command, Control, Computers and Communications, Intelligence Surveillance and Reconnaissance (C4ISR), Land battlespace, counter terrorism, and nuclear deterrence domains. He has a particular interest in simulation modelling which he has used to design and deliver models for as diverse a purpose as IED detection, satellite communications capacities, and vehicle fleet management.