Lecturer in Applied Statistics, University of Aberdeen

I answer
questions
with data.

Most of the job is working out what the data can’t tell you.

“Does the landscape change how fast it spreads?”

\[\mu_i = f(\rho_{0,i}) + f(\rho_{1,i}) + f(\rho_{2,i})\]

\[\rho_{j,i} = T + \left(\frac{1}{\zeta_{j,i}}\right) \times D_{j,i} \quad \text{for } j \in \{0, 1, 2\}\]

\[D_{j,i} = -\sqrt{(x_j - x_i)^2 + (y_j - y_i)^2}\]

\[\zeta_{j,i} = \beta_0 + \class{eq-hi}{\beta_1} \times z_i\]

z ∼ fBm · 3 SOURCES
SCROLL
01 How I work

The question decides the model, not the other way round.

Data

I generally work with messy data, collected, scraped, or simulated, and often not actually measuring what we hope it does.

Fields

Interdisciplinary, but a lot in biology and medicine.

Approach

No favourite method. Mostly hierarchical, Bayesian, and simulation-based models, chosen to suit the question.

02 Most recent work
SYNCED FROM ORCID · 0000-0003-4866-7472
2026Karolin Hijazi, Sara Sharaf, Susanth Alapati, Hadeel Abbood, Deon Roos, Claudia Trappetti, Marco R. Oggioni, Whole-body decolonisation policies and Staphylococcus aureus bacteraemia rates in acute hospitals in England: a national cross-sectional survey. Journal of Hospital Infection 2025Sara Sharaf, Timothy Lawes, Deon Roos, Ijeoma Okoliegbe, Susanth Alapati, Antonio Ribeiro, Istifanus Nkene, Daniele Ghezzi, Stuart J Reid, Victoria Austin, Dolapo Ayansina, Becky Wilson, Tanzeel Rehman, Benjamin J Parcell, Ian Mellor, Charis A Marwick, Marco Oggioni, Karolin Hijazi, Universal versus targeted chlorhexidine and mupirocin decolonisation and clinical and molecular epidemiology of Staphylococcus epidermidis bloodstream infections in patients in intensive care in Scotland, UK. The Lancet Microbe 2025Cristiano Tiberi, Sarah Beatham, Julia Coats, Izzy Rochester, Deon Roos, Riccardo Primi, Andrea Vitali, Giovanna Massei, An assessment of whether age, sex, and reproductive status affect bait uptake by grey squirrels. Journal of Wildlife Management 2024Tiago Crispim-Mendes, Deon Roos, Clara Mendes Ferreira, Joana Paupério, João Paulo Silva, Sérgio Godinho, Paulo Célio Alves, António Mira, Pedro Beja, Xavier Lambin, Ricardo Pita, Patch spatial attributes and time to disturbance affect the emergence of source local populations within ephemeral habitats. Ecological Modelling 2024Ijeoma Nnenna Okoliegbe, Sara Aly Abdelfatah Sharaf, Susanth Alapati, Deon Roos, Antonio Ribeiro, Istifanus Nkene, Daniele Ghezzi, Stuart Reid, Victoria Austin, Dolapo Ayansina, Rebecca Wilson, Tanzeel Ur-Rehman, Benjamin J Parcell, Ian Mellor, Charis A. Marwick, Marco Oggioni, Karolin Hijazi, Effects of universal versus targeted chlorhexidine skin decolonisation on the clinical and molecular epidemiology of Staphylococcus epidermidis bloodstream infections in intensive care. SSRN Preprints with The Lancet
Open-access textbook
An Introduction to R. Free, online, and available to anyone.
Read it
Most recent output shown; the full list is pulled automatically from ORCID.
03 Teaching

Statistics courses at undergraduate and postgraduate level, focused on building genuine understanding rather than recipe-following.

3RD YEAR UNDERGRADUATE

BI3010, Statistical Analysis of Biological Data

From linear models through to GLMs. The goal is understanding the theory well enough to apply it to your own questions, with R and ggplot2 throughout.

Rggplot2Linear ModelsGLMsCausal Inference
POSTGRADUATE / PHD

PGR, Generalised Linear Models

A free course on the theory and application of GLMs, open to students from any university and any discipline, part of a wider series covering R and linear models.

RPoisson GLMBinomial GLMBernoulli GLM
Guest lectures
PU5058
Introduction to Health Data Science The theory underlying effective data visualisation.
Postgraduate
05 People & supervision

PhD students I currently supervise, and the undergraduate honours theses I’ve supervised.

PhD Students
Seungyeon Lee
University of Aberdeen
2024 – Present

Integrated population models of tawny owls.

James Owen
Queen’s University Belfast
2025 – Present

Geoprofiling methodology development.

Joe Davidson
University of Aberdeen
2026 – Present

Predicting vole population cycles using raptor data.

Sam Durston
University of St Andrews
2026 – Present

Refining spatial methodology for marine environments.

Undergraduate Theses (click a row to download)
2015 Deon Roos, Water vole ecosystem engineering PDF 2024 Shanan Davies, Roe deer occupancy and habitat preferences PDF 2024 Alice Semple, Predicting vole population growth and cycles PDF 2025 Joe Davidson, Post-release pheasant distribution PDF 2025 Grace Sommerville, Media coverage of illegal lynx reintroduction PDF 2025 Zitong Lui, Roe deer and road collision risk DOCX
06 Career
ZOOLOGY · ECOLOGY · APPLIED STATISTICS
Education
BSc Zoology BSc (Hons) Zoology, First Class. University of Aberdeen, 2012 to 2016.
PhD Ecology PhD Ecology: rodent pest population dynamics. University of Aberdeen, 2016 to 2021.
Employment
Fellowships Teaching and Research Fellow, University of Aberdeen, 2020 to 2022.
APHA Senior Statistical Ecologist, Animal and Plant Health Agency, 2022 to 2024.
Lecturer Lecturer in Applied Statistics, University of Aberdeen. Current role, from 2024.
2012 2016 2020 2024 NOW

Currently Lecturer in Applied Statistics, University of Aberdeen, previously Senior Statistical Ecologist at the Animal & Plant Health Agency, and Teaching / Research Fellow at Aberdeen. PhD Ecology (rodent pest population dynamics) and a First-Class BSc Zoology, both Aberdeen.

Spatio-temporal modellingSimulation-based inferenceObservation processesHierarchical modelsDensity estimation
Bayesian inferenceOccupancy modellingData visualisationCausal inferenceMachine learningRRShinyQuarto
Full CV
07 Get in touch

Questions
welcome.