John Thelen
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John Thelen Email & Phone Number

Director of Major Projects and Strategic Support - Directorate of Nuclear Fuel Cycle Regulation at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire
Location: Greater Ottawa Metropolitan Area, Canada 12 work roles 4 schools
1 work email found @cnsc-ccsn.gc.ca LinkedIn matched
✓ Verified July 2026 4 data sources Profile completeness 100%

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Role
Director of Major Projects and Strategic Support - Directorate of Nuclear Fuel Cycle Regulation
Location
Greater Ottawa Metropolitan Area, Canada
Company size

Who is John Thelen? Overview

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Quick answer

John Thelen is listed as Director of Major Projects and Strategic Support - Directorate of Nuclear Fuel Cycle Regulation at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire, a with 672 employees, based in Greater Ottawa Metropolitan Area, Canada. AeroLeads shows a work email signal at cnsc-ccsn.gc.ca and a matched LinkedIn profile for John Thelen.

John Thelen previously worked as DIRECTOR (acting) - Operations Inspection Division - Regulatory Operations Branch at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté Nucléaire and DIRECTOR - Operations Secretariat - Regulatory Operations Branch at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté Nucléaire. John Thelen holds M.Sc., Environmental Engineering & Sciences, Summa Cum Laude from The Johns Hopkins University.

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Email format at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire

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{first}.{last}@cnsc-ccsn.gc.ca
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Profile bio

About John Thelen

I am an employee of Canada's nuclear regulator, the Canadian Nuclear Safety Commission (CNSC). My career includes more than 25 years of successively more complex technical and supervisory work duties dealing with industrial and nuclear facility operations and legacies. My career began in New Jersey and Maryland as an environmental remediation specialist planning and conducting fieldwork campaigns at contaminated EPA Superfund sites. A move back to Canada resulted in a career reboot in 2007 as a CNSC project officer and inspector of nuclear fuel cycle facilities and waste management facilities. More recent responsibilities include: providing strategic advice to executive management; communicating with various stakeholders including indigenous groups; collaborating with provincial, federal and international regulatory bodies; and leading CNSC teams responsible for licensing, compliance and enforcement programs.

Listed skills include Risk Assessment, Environmental Impact Assessment, Environmental Awareness, Environmental Compliance, and 23 others.

Current workplace

John Thelen's current company

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Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire
Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté Nucléaire
Director of Major Projects and Strategic Support - Directorate of Nuclear Fuel Cycle Regulation
ottawa, ontario, canada
Employees
672
AeroLeads page
12 roles

John Thelen work experience

A career timeline built from the work history available for this profile.

Director - Operations Secretariat - Regulatory Operations Branch

Ottawa, Ontario, Canada

I am extremely excited to lead a strong team focussed on four key areas: CNSC's licensing program, compliance program, regulatory improvement initiatives, and providing coordination/support for various ops-focussed national and international events and activities.

Jan 2023 - Dec 2023

Team Coordinator - Nuclear Substances Processing And Fuel Fabrication Facilities

Ottawa, Ontario, Canada

Responsible for conducting inspections and coordinating the oversight of compliance verification of licensee health, safety, security, environment, and quality programs necessary to meet CNSC’s regulatory requirements.

Jun 2020 - Dec 2021

Inspector & Senior Project Officer

Ottawa, Ontario, Canada

Lead inspections at Canada's uranium processing facilities and other licensed facilities that process nuclear substances (radioisotopes) for medical and industrial applications; mentor new inspectors and inspectors-in-training; instructor of a mandatory hazard awareness training course for inspection team members.

Oct 2018 - Jun 2020

Program Supervisor - Major Decommissioning And Waste Management Projects

Ottawa, Ontario, Canada

Major Decommissioning Projects, Directorate of Nuclear Cycle and Facilities Regulation. Direct oversight of eight direct staff as well as indirect leadership over dozens of CNSC technical staff brought together to plan and implement licensing and compliance programs for three major Canadian Nuclear Laboratories (CNL) projects: (i) a licence amendment request for a Near Surface Disposal Facility (NSDF) at the Chalk River Laboratories (CRL) site; (ii) a licence amendment request for in situ disposal of the Nuclear Power Demonstration (NPD) reactor and its related components, systems and structures as part of the NPD Site Closure Project; and, (iii) a licence renewal request for the Whiteshell Laboratories site, as well as a request for in situ disposal of the WR-1 reactor. All three of these major projects are undergoing both Canadian Environmental Assessment Act, 2012 (CEAA 2012) and CNSC licensing regulatory actions simultaneously. This role gave me an opportunity to simultaneously take on technical, project management and financial management responsibilities. This included the coordination of in-depth technical reviews of safety analysis and environmental impact assessment reports. Supervision of senior staff involved in carrying out inspections, site assessments, and technical assessments of nuclear and industrial facilities as well as contaminated land. Responsible for project scheduling and task budgeting, dealing with contractors, liaising with local stakeholders, and working with national and international regulators.

Sep 2017 - Oct 2018

Director (Acting), Environmental Compliance And Laboratory Services

Ottawa, Ontario, Canada

Management of Environmental Compliance, Health Sciences and Laboratory Services activities and personnel.

Jun 2017 - Aug 2017

Project Officer

Ottawa, Ontario, Canada

As a Senior Project Officer, I conduct inspections and other compliance activities to verify the safe operation of nuclear facilities across Canada. Technical expertise includes contaminated site investigation and remediation, and the assessment of risks to the public and the environment.

Oct 2010 - May 2017

Environmental Risk Assessment Officer

Ottawa, Ontario, Canada

As an ERA Officer for the CNSC, my responsibilities included evaluating conceptual site models and pathways analysis from exposure to nuclear and hazardous substances measured in releases from nuclear facilities.

Sep 2007 - Sep 2010

Environmental Risk Assessor / Aquatic Sciences Regional Lead

Jacques Whitford (Currently: Stantec)

Ottawa, Ontario, Canada

Aug 2005 - Aug 2007

Senior Project Scientist

Blasland Bouck & Lee Sciences (Currently: Arcadis)

Cranbury, New Jersey And Annapolis, Maryland

BBL (Blasland, Bouck and Lee, Inc.) [currently ARCADIS]

Apr 2000 - Jul 2005
Team & coworkers

Colleagues at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire

Other employees you can reach at nuclearsafety.gc.ca. View company contacts for 672 employees →

SM Suzanne Monette Suzanne Monette Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireOrleans, Ontario, Canada View → SF Susan Fundarek Susan Fundarek Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireOttawa, Ontario, Canada View → TT Thi Thanh Thao Phan Thi Thanh Thao Phan Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireOttawa, Ontario, Canada View → PB Pierre Belanger Pierre Belanger Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireOttawa, Ontario, Canada View → PP Philippe Petitclerc Philippe Petitclerc Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireGreater Montreal Metropolitan Area, Canada View → AA Alice Alex Alice Alex Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireKitchener, Ontario, Canada View → CM Clea Mittag Clea Mittag Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireGreater Ottawa Metropolitan Area, Canada View → AD Aleksandar Delja Aleksandar Delja Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireGreater Ottawa Metropolitan Area, Canada View → SB Sean Belyea Sean Belyea Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireOttawa, Ontario, Canada View → PM Pirooz Mirfakhraei Pirooz Mirfakhraei Colleague at Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté NucléaireOttawa, Ontario, Canada View →
4 education records

John Thelen education

M.Sc., Environmental Engineering & Sciences, Summa Cum Laude

Website: https://ep.jhu.edu/programs/environmental-engineering-and-science/

Certificate, Fellow - Leadership, Nuclear Industry/Regulatory

World Nuclear University - Summer Institute 2016

The World Nuclear University Summer Institute or WNU SI [https://www.linkedin.com/company/world-nuclear-university] is an intensive.

Graduate Diploma, Ecotoxicology

Activities and Societies: Student Representative, 1998/1999.Websites: http://chem.concordia.ca/ http://biology.concordia.ca/

Bsc., Biology (Honours)

Activities and Societies: Queens Football ('93, '94, '95, '96, '97).Website: http://www.queensu.ca/biology

FAQ

Frequently asked questions about John Thelen

Quick answers generated from the profile data available on this page.

What company does John Thelen work for?

John Thelen works for Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire.

What is John Thelen's role at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire?

John Thelen is listed as Director of Major Projects and Strategic Support - Directorate of Nuclear Fuel Cycle Regulation at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire.

What is John Thelen's email address?

AeroLeads has found 1 work email signal at @cnsc-ccsn.gc.ca for John Thelen at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire.

Where is John Thelen based?

John Thelen is based in Greater Ottawa Metropolitan Area, Canada while working with Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire.

What companies has John Thelen worked for?

John Thelen has worked for Canadian Nuclear Safety Commission – Commission Canadienne De Sûreté Nucléaire, Canadian Nuclear Safety Commission, Jacques Whitford (Currently: Stantec), and Blasland Bouck & Lee Sciences (Currently: Arcadis).

Who are John Thelen's colleagues at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire?

John Thelen's colleagues at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire include Suzanne Monette, Susan Fundarek, Thi Thanh Thao Phan, Pierre Belanger, and Philippe Petitclerc.

How can I contact John Thelen?

You can use AeroLeads to view verified contact signals for John Thelen at Canadian Nuclear Safety Commission – Commission canadienne de sûreté nucléaire, including work email, phone, and LinkedIn data when available.

What schools did John Thelen attend?

John Thelen holds M.Sc., Environmental Engineering & Sciences, Summa Cum Laude from The Johns Hopkins University.

What skills is John Thelen known for?

John Thelen is listed with skills including Risk Assessment, Environmental Impact Assessment, Environmental Awareness, Environmental Compliance, Project Management, Environmental Management Systems, Remediation, and Program Management.

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