top of page

ABOUT DTPS LTD.

Operator-side experience,
applied to
your success
with major oil sands clients.

DTPS Ltd. is a Calgary-based consulting firm that helps vendors and service companies position to win and expand with the major oil sands operators, founded on operator-side experience at Imperial Oil and CNRL.

FOUNDER

Diana Tulegen, P.Eng., MSc

Independent Oil Sands Business Consultant

Diana’s advice draws on her operator-side project management and field experience. 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

Diana Tulegen, P.Eng., at an oil sands site

2022

2020–

2021

  • LinkedIn

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

Available for engagements across Alberta.

 → Schedule a Discovery Call

GET IN TOUCH

 

DTPS Ltd. operates from Moh'kinsstsis, in the Treaty 7 territory of southern Alberta, on the traditional lands of the Blackfoot Confederacy (Siksika, Kainai and Piikani), the Tsuut'ina Nation and the Îyârhe Nakoda Nations (Chiniki, Bearspaw and Goodstoney). This is also the homeland of the Otipemisiwak Métis Government, Nose Hill Métis District and Elbow Métis District.

Our work takes us into Treaty 8 territory in the Athabasca region, the traditional lands of the Cree, Dene and Métis peoples of Wood Buffalo.

© 2026 DTPS Ltd. All rights reserved.

bottom of page