If a Canadian government RFP, an enterprise vendor review, or your own board has asked for a threat and risk assessment (TRA), you've probably discovered that "just get one done" is not a simple instruction. A TRA is a formal document that identifies your organization's assets, catalogues the threats against them, and rates each threat by likelihood and impact so decision makers can see where to spend money first. Done properly, it's one of the more useful security artifacts you'll produce, not just a compliance checkbox. Here's what the process actually looks like from a cold start to a signed-off report.
Step 1: Confirm why you need it and what "done" looks like
Before anyone opens a spreadsheet, get clear on the driver. A TRA required for a Government of Canada procurement (often referencing ITSG-33) looks different from one requested by an enterprise customer's vendor security team, which looks different again from one you're commissioning proactively because you're about to launch a new product. The driver determines the scope, the methodology, and often the exact template the reviewer expects. If a specific standard or client questionnaire is in play, get a copy of it before you start scoping. Guessing at requirements is the single biggest cause of a TRA getting bounced back.
Step 2: Define scope and asset boundaries
A TRA that tries to cover "the whole company" usually ends up too shallow to be useful and takes far longer than it needs to. Scope it to a defined boundary: a system, an application, a data flow, a business unit, or a specific engagement (like the one being procured). List the assets in scope: the data, the infrastructure, the third-party services, and the people and processes that touch them. This asset inventory is the backbone the rest of the assessment hangs off, so it's worth doing carefully rather than quickly.
Step 3: Identify threats and vulnerabilities
With assets defined, work through what could go wrong for each one. This means identifying threat sources (external attackers, malicious insiders, accidental error, supply chain compromise, environmental events) and the vulnerabilities that would let those threats materialize. Most teams pull from a recognized threat catalogue rather than inventing one from scratch, and cross-reference known weaknesses in the systems involved. This is also where having someone who actually thinks like an attacker pays off. A threat list built purely from a checklist tends to miss the scenarios that matter most for your specific environment.
Step 4: Rate likelihood and impact
This is the core of a TRA and the part reviewers scrutinize most closely. Each identified threat gets scored on how likely it is to occur and how severe the consequences would be if it did, usually on a simple scale (low, medium, high, or a numeric equivalent). The scoring needs to be defensible, not just gut-feel. Reviewers, especially government procurement teams, will ask why a risk was rated medium instead of high, so document your rationale alongside each score. The output is typically a risk matrix that plots likelihood against impact and makes it immediately obvious which risks need attention first.
Step 5: Recommend safeguards and residual risk
A TRA that only lists problems isn't finished. For each significant risk, recommend a safeguard, whether that's a technical control, a policy change, or a process fix, and then re-rate the risk assuming the safeguard is in place. That gives you residual risk: what's left over after mitigation. This is the number decision makers actually care about, because it tells them whether the remaining exposure is acceptable or whether more work is needed before go-live or contract signature.
Step 6: Document, review, and get sign-off
Pull everything into a formal report: scope, methodology, asset inventory, threat catalogue, risk ratings, recommended safeguards, and residual risk. Government and enterprise reviewers expect a specific structure, so match it to whatever template or standard triggered the requirement in step 1. Route the draft through internal review, then get formal sign-off from whoever owns the risk decision. Keep the report and its supporting evidence on file. It's common for the same TRA to get requested again by the next customer or the next procurement cycle, and having a clean, well-documented baseline saves you from starting over.
Realistic timelines
For a tightly scoped system or application, a focused TRA typically takes two to four weeks from kickoff to a signed-off report, assuming reasonable access to the people and documentation you need. Broader assessments covering multiple systems or a full business unit can run six weeks or more. The biggest delays aren't in the analysis, they're in gathering accurate asset information and getting the right people in the room to validate threat scenarios and sign off on ratings. Building in time for at least one review cycle with the requesting party is worth planning for from the outset.
Where a partner helps
You can run a TRA entirely in-house if you have the security expertise and the time. Where most teams get stuck is steps 3 and 4: building a threat list that reflects real attacker behaviour rather than a generic checklist, and defending the likelihood and impact ratings under a reviewer's questions. That's where bringing in a partner with hands-on offensive security background, rather than someone who has only ever filled out the template, changes the outcome. Our threat and risk assessment service is built around exactly that gap: a formal, defensible TRA scoped to your procurement or vendor review requirement, delivered on a timeline that matches your deadline. If the TRA is one piece of a larger compliance push, it's also worth looking at how it fits into your broader compliance program rather than treating it as a one-off deliverable.
Get started
If you have a TRA requirement on the table, whether it's a government procurement deadline or an enterprise customer's vendor security review, the sooner you scope it the more room you have to do it properly instead of rushing the last week. Contact us and we'll walk through your specific requirement, confirm scope, and give you a realistic timeline and quote.