Principal Modeller

Overview

We are seeking a principal mathematical modeller to join our team, leading the design and development of innovative models that inform market access and health outcomes. This senior technical role involves leading complex projects, mentoring colleagues, and partnering with clients to deliver solutions that matter, particularly in oncology and other high‑priority disease areas.

HEOR is a leading independent market access consultancy driven by producing high‑quality work with scientific and technical rigour. We work with agility and purpose, focusing on delivering exceptional insight and supporting clients to navigate complex market access challenges to optimise and articulate the value of their healthcare interventions.

• Leadership: Collaborate closely with senior leadership to shape working practices and strategic direction for the team. Mentor and develop team members.
• Drive innovation: Lead and embed internal and external innovation projects, developing novel solutions to complex and demanding challenges.
• Collaboration with leading experts: Work alongside a fast‑moving, forward‑thinking team dedicated to tackling complex technical challenges.

• Develop, conceptualise, and build discrete numerical models of healthcare interventions to demonstrate real‑world impact.
• Act as the technical and strategic lead on modelling projects, ensuring scientific rigour and client relevance.
• Lead a broad range of healthcare intervention projects and models simultaneously, including oncology.
• Oversee data sourcing, model protocols, and model validation, ensuring deliverables such as technical documentation meet the highest quality standards.
• Mentor and coach team members, fostering technical excellence and collaborative problem‑solving.
• Drive innovation and best practice, contributing to internal training and process‑improvement initiatives.
• Become a trusted partner to our clients, providing consultative advice on market access challenges.
• Represent the company in client meetings, proposals, and pitches, influencing strategic decisions.
• Support client development by identifying opportunities and driving the creation of technical modelling proposals.
• Contribute to research dissemination, including publications and conference presentations.

• Advanced academic credentials ideally in mathematics or a related scientific, engineering, or computing discipline, with deep expertise in algorithm development.
• Strong grounding in statistical and stochastic processes and/or linear algebra.
• Passion for algorithms and modelling, approaching complex challenges with curiosity and innovation.
• Proven ability to tackle problems proactively, working independently or within an agile team to achieve impactful outcomes.
• Self‑starter who is confident working both independently and collaboratively, taking initiative to move projects and ideas forward.
• Growth mindset, continuously looking to improve technical methods and working practices for optimisation and efficiency.
• Excellent communication skills, with the ability to translate complex modelling concepts for diverse audiences.
• Experience leading projects and mentoring technical teams.
• Ability to manage multiple priorities and deliver high‑quality outputs under tight timelines.
• Familiarity with programming languages such as C/C++, R, or Python, and understanding of object‑oriented principles, is an asset.
• Experience developing models using best‑practice methods and version control (e.g., Git and Git Hub).
• Experience with modelling within VBA/Excel is also an asset.
• Proven experience in developing economic models (budget impact, cost‑effectiveness).
• Oncology experience and cardio‑renal metabolic modelling knowledge are highly desirable.

Competitive compensation and benefits package, including:

• A ‘learning' culture focused on personal development and supported by study bursaries.
• Workplace pension scheme.
• Private health insurance with AXA Health.
• Range of high street, supermarket, restaurant, gym membership, holiday and entertainment discounts via Pluxee.
• Employee assistance programme.
• Employees receive an additional day of leave for: their wedding and moving house.
• Annual leave purchase scheme of up to 10 additional days per year.

If you would like to request any reasonable adjustment, for any part of the recruitment process (including application), please let us know by emailing