top of page
ABOUT DTPS LTD.
Operator-side experience,
applied to your success
with major oil sands clients.
DTPS Ltd. helps oil sands vendors and service companies position themselves to win work with major operators, based on experience leading operator-side brownfield projects.
FOUNDER
Diana Tulegen, P.Eng., MSc
Independent Oil Sands Business Consultant
Diana’s advice draws on her operator-side project management experience with major Alberta oil sands operators. She has managed capital and operational projects valued up to $60 million across mine, extraction and tailings environments — working between Calgary project offices and field sites at Kearl and Cold Lake. Her disciplined approach to project development and execution has resulted in 15-20% cost savings (up to $11 million per project) and schedule improvements to meet critical regulatory requirements.
Diana has been directly accountable for managing front-end project planning, commercial risk identification, capital funding and execution planning for brownfield projects in upstream assets. During this time, Diana worked with over 20 contractor and vendor companies, selecting EPCs, engineering firms and construction companies for FEED, detailed engineering and execution. She negotiated equipment procurement scopes and evaluated software solutions for project teams.
Diana now uses her operator-side experience to help service companies translate owner strategies into clear business targets.
Experience
2023–
2025
Imperial Oil / ExxonMobil
Calgary-based project development and execution with site presence at Kearl & Cold Lake — brownfield portfolios of
$200K–$60M
​
CNRL, Horizon Oil Sands
Site-based process engineering,
tailings pilot — Fort McMurray
​
University of Alberta
M.Sc. research — bitumen
physical properties & partial upgrading

2022​
2020–
2021
CREDENTIALS & BACKGROUND
M.Sc. Chemical Engineering,
University of Alberta
Education
Insurance
E&O Insurance
Active coverage
Incorporated
DTPS Ltd.
Alberta, 2025
P.Eng. Professional Engineer, APEGA
Designation
GET IN TOUCH
bottom of page
