Senior Estimator - Nuclear Decommissioning & Environmental Remediation

Senior Estimator - Nuclear Decommissioning & Environmental Remediation Type: Full‑Time | Location: Remote / Hybrid – site visits required (Canadian nuclear sites) | Sector: Nuclear/Decommissioning / Radioactive Waste Management / Environmental Remediation

About us: Since 2011, Dokainish & Company has delivered project controls and project management consultancy services to owners and developers across North America and the Middle East. Our work spans capital construction programs, commercial office towers, institutional facilities, mission‑critical infrastructure, and corporate campus developments, where our consultants are embedded directly with owner teams to protect schedule, cost, and delivery outcomes. We specialize in Project Controls, Project Management, Quantitative Risk Analysis, Estimating, and Enterprise Reporting for major capital projects.

Opportunity Dokainish & Company is seeking a Senior Estimator to join a high‑performing program controls team supporting a major, long‑duration nuclear decommissioning and radioactive waste management program. This is a technically demanding, high‑visibility role in which the incumbent will own the end‑to‑end development of project cost estimates and supporting documentation across a complex, multi‑project portfolio, spanning reactor decommissioning, radioactive waste facility operations, environmental remediation, and fuel processing programs.

Prior hands‑on estimating experience on nuclear decommissioning projects or within licensed nuclear facilities is strongly preferred. Candidates with direct exposure to a nuclear facility environment, including decommissioning, waste management, remediation of contaminated nuclear sites, or active nuclear plant maintenance and modifications, will be given strong preference.

The successful candidate will bring deep estimating craft, not just process familiarity, and will be expected to build, defend, and stand behind their estimates throughout client review cycles. This is a builder role, not a reviewer role. We are hiring for a full‑time permanent role. Exceptional candidates seeking a fixed‑term or contract engagement may be considered for alternative arrangements.

Key Responsibilities

Develop project‑level baseline cost estimates (AACE Class 3–5) across a diverse portfolio of nuclear decommissioning, waste management, and remediation projects.

Produce comprehensive Bases of Estimate (BOE) for each project, including methodology narrative, source data, escalation rationale, key assumptions, exclusions, and stated accuracy range.

Apply parametric, analogous, and bottom‑up estimating methodologies; select the appropriate approach based on available information and document the rationale explicitly.

Develop time‑phased cost profiles integrated with project schedules; collaborate with senior schedulers on cost loading, resource histograms, and S‑curve generation.

Provide cost uncertainty inputs (P10/P50/P90 distributions, key cost drivers) to the project risk and quantitative risk analysis process.

Establish and apply consistent estimating norms and unit rates scaled to project complexity and information maturity across the portfolio.

Support program‑level planning deliverables: resource allocation plans, escalation profiles, and multi‑year cost projections.

Respond to queries on estimate basis and methodology with traceable, well‑documented backup within defined timelines.

Qualifications & Requirements

Minimum 10 years of capital project estimating experience; significant experience in nuclear decommissioning, radioactive waste management, environmental remediation of nuclear‑contaminated sites, or capital projects within licensed nuclear facilities (CANDU, research reactors, fuel processing, isotope production, or equivalent) is strongly preferred.

Demonstrated experience preparing estimates across AACE Class 1–5 on projects of significant scale and complexity.

Strong BOE authorship track record; document samples will be requested during the interview process.

Experience in multi‑project program environments with concurrent estimate workloads.

AACE membership in good standing; CCP, CEP, or PSP designation preferred.

University degree in Engineering, Construction Management, Applied Sciences, or a related field; equivalent combinations of technical certification and demonstrated experience will be considered.

Must be eligible for Canadian nuclear facility security clearance; existing clearance is an asset.

Application Requirement – BOE Sample A Basis of Estimate (BOE) document sample must be submitted with your application. Please redact any confidential client or project information prior to submission. Applications without a BOE sample will not be considered.

What Sets the Right Candidate Apart

A track record of nuclear decommissioning or nuclear facility estimating as the primary work, not supporting or incidental exposure.

BOE authorship at a standard that holds up under independent technical review. Candidates should be able to walk through their document structure from memory and articulate what reviewers will challenge.

Estimating across multiple simultaneous projects, production discipline, not just depth on one large assignment.

Experience in Canadian nuclear is a strong differentiator.

Comfort operating in a structured, milestone‑driven program controls framework alongside schedulers, risk analysts, and program managers.

This role description is intended to provide a general overview of the position. It is not an exhaustive list of all responsibilities, duties, skills, or qualifications required.

If you believe your skillset, drive, qualifications, and experience align, we welcome your application and can’t wait to hear from you.

We thank all applicants for their interest in joining Dokainish & Company. Only candidates considered for an initial interview will be contacted.

Vacancy Status: This posting is for a new position. AI usage: This organization does not use artificial intelligence to screen, assess, or select applicants for this particular open position. All applications are personally reviewed by our Talent Acquisition Team.

Equal Opportunity Employer – Qualified applicants will receive consideration for employment without regard to age, gender, race, colour, religion, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected status required by applicable law.

In accordance with the Ontario Human Rights Code, Accessibility for Ontarians with Disabilities Act, 2005, and Dokainish & Company AODA Policy, accommodation will be provided in all parts of the hiring process. Applicants must make their needs known in advance.

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