About

Welcome! I am a fifth-year PhD candidate in Decision Sciences at Duke University's Fuqua School of Business.

My research develops algorithms with provable performance guarantees for problems in the scope of e-commerce fulfillment, vehicle routing, and sequential search. A common theme is understanding how algorithms perform as problem scale grows.

Education

Duke Fuqua
Duke University
Ph.D. in Decision Sciences
Current
Bilkent
Bilkent University
M.S. in Industrial Engineering
2021
Bilkent
Bilkent University
B.S. in Industrial Engineering
2019

Research

Publications & Accepted Papers

Online Demand Fulfillment Problem with Initial Inventory Placement: A Regret Analysis
Operations Research (forthcoming) · with Alessandro Arlotto, Yehua Wei
DOI ↗
Outer Approximation Algorithms for Convex Vector Optimization Problems
Optimization Methods and Software, 2023 · with Firdevs Ulus
DOI ↗

Working Papers

Working Paper
Finding the Best Arm Privately in Unimodal Bandits
with Jiaming Xu · 2025
SSRN ↗
Manuscript in Preparation
Asymptotically Optimal Algorithms for Vehicle Routing Problem with Pickup and Delivery
with Yehua Wei

Conference Presentations

Experience

Teaching

Instructor — Decision Models
Spring 2025
Duke University, Pratt School of Engineering
  • Taught optimization, simulation, and decision trees in Excel to 50 master's students.
  • Instructor ratings: 4.74 / 5 (in-person) · 5 / 5 (online).
Teaching Assistant — Data Science for Business
Fall 2022 – Fall 2025
Duke University, Fuqua School of Business
  • Recruited and managed over 15 TAs from other departments; effectively distributed workload among them.
  • Held 5 office hours per week to help students with R programming.
Teaching Assistant — Decision Analytics and Modeling
Spring 2024
Duke University, Fuqua School of Business
Teaching Assistant — Decision Models
Spring 2024
Duke University, Fuqua School of Business
Teaching Assistant — Technology Transformation of Business
Fall 2023
Duke University, Fuqua School of Business

Industry (Pre-PhD)

Industry Sponsored Project
Sep 2018 – Jun 2019
Unilever
  • Implemented product segmentation strategies to improve Unilever's ice cream supply chain performance.
  • Built interactive tools that streamlined product cluster updates for the demand planning team.
Commercial Banking Intern
Jul – Aug 2018
Fibabanka
Production Intern
Jul – Aug 2017
Mondelez International
Production Intern
Jun – Jul 2017
Sisecam

Methods & Tools

Technical

Programming
PythonRSQLMATLAB
Optimization & Solvers
GurobiCPLEXCVXOR-Tools
ML & Data Science
PyTorchTensorFlowscikit-learnpandasNumPySciPy
Dev Tools
GitJupyterLaTeX

Research Areas

Algorithm Design & Analysis
Sequential Decision-Making
Stochastic Optimization
Online & Approximation Algorithms
Inventory & Supply Chain Management
Multiobjective Optimization
Applied Probability

Contact

Email
LinkedIn
irem-nur-keskin

I'm always happy to connect about research, collaborations, or opportunities. Feel free to reach out by email.

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