30/60/90 Verification: Construction Interview Process for GCs
The fastest way to predict on-site performance and reduce project risk is to combine a structured, scenario-based interview with formal subcontractor prequalification and documented scoring. This approach draws on tools like ConsensusDocs 721 and 220, follows EEOC and ADA guidance on lawful questioning, and reflects lessons from more than 30 years of AEC recruiting. What follows breaks the process into steps you can put to work immediately, from writing scenario questions to running 30/60/90-day verification after hire.
TL;DR:
- Using scenario-based interview questions aligned with specific job tasks improves the prediction of on-site safety behavior over unstructured interviews.
- Prequalification documents like ConsensusDocs 721 and 220 standardize subcontractor and constructor evaluation based on safety, financial stability, and experience before signing contracts.
- Employers must focus on essential job functions and avoid medical or medication questions before a conditional offer to remain compliant with EEOC and ADA regulations.
- A structured 30/60/90-day verification process ensures ongoing compliance and performance validation beyond initial preemployment checks.
- R. Construction Solutions provides recruiting and prequalification services, including subcontractor sourcing, with payment structures based on results rather than upfront fees.
Table of Contents
- Designing structured, scenario-based interviews for construction roles
- Prequalifying subcontractors and partners before you sign anything
- Staying on the right side of ADA and EEOC rules
- Scoring, shortlisting, and comparing candidates objectively
- Onboarding verification and continuous screening after hire
- How R. Construction Solutions applies this process in placements
- Put this workflow to work with R. Construction Solutions
- Sources
- FAQ
Designing structured, scenario-based interviews for construction roles
Unstructured interviews rely on gut feeling, and gut feeling is a poor predictor of who will stop work when they spot a hazard or troubleshoot a jammed crane. Industry guidance increasingly points hiring teams toward scenario-based interview questions that ask candidates to describe real actions they took, rather than how they would generally behave. That shift matters because a candidate who talks fluently about safety culture is not the same as one who has actually shut down a pour over a fall-protection issue.
Start by listing the three to six tasks that define success in the role: managing a safety incident, handling a permit delay, responding to equipment failure on a live site. Turn each into a scenario question and score responses on a 1 to 5 scale with anchors written in advance, so a 5 for a foreman might mean “immediately halted work, documented the hazard, and notified the safety officer,” while a 2 might mean “continued work and reported later.”
- Write scenario questions directly from job task lists, not from generic personality traits.
- Use behaviorally anchored scores so two interviewers rate the same answer the same way.
- Train every interviewer on the rubric before the first candidate walks in.
- Keep timing consistent across candidates and take verbatim notes, not summaries.
Role-specific question banks, such as those built for hiring a construction project manager or for safety manager positions, save time and keep scenarios grounded in the actual demands of the job.
Pro Tip: Ask every candidate the same follow-up question, word for word, so you can compare answers side by side instead of relying on memory.
Prequalifying subcontractors and partners before you sign anything
Interviewing people is only half the vetting job. General contractors and owners rely on standardized prequalification forms to compare subcontractors and constructors on the same basis, rather than trusting a sales pitch. The ConsensusDocs 721 Statement of Qualifications captures a subcontractor’s project history, experience modification rate (EMR), bonding capacity, financial stability, and key personnel, giving you one document to compare across bidders. For larger engineered projects, the ConsensusDocs 220 Contractor Qualification Statement collects similar data on workload, organizational structure, and financial strength for constructors themselves.
Before any contract is signed, request:
- A written safety program and recent EMR history.
- A bonding letter from the subcontractor’s surety.
- Two to three years of financial statements.
- Resumes for the key personnel who will actually staff the job.
- Current certificates of insurance.
Tailor the depth of this request to project risk: a small tenant buildout needs less scrutiny than a multi-story structure with a tight schedule. A document checklist paired with an office or yard visit and direct reference calls rounds out the picture, and verifying bonding capacity directly with the surety catches problems a financial statement alone can miss. Our subcontractor prequalification checklist and bonding qualification checklist walk through both steps in detail.
Staying on the right side of ADA and EEOC rules
Under EEOC guidance, employers cannot ask about disabilities, medications, or medical treatment before extending a conditional job offer, and a recent enforcement action shows the cost of getting this wrong. In one case, the EEOC sued a ready-mix and concrete construction company after applicants who disclosed medication use, including methadone, were reportedly turned away, a scenario the agency treated as a possible ADA violation.
A single enforcement action against a concrete construction employer shows how medication-related questions before a conditional offer can trigger federal scrutiny, regardless of intent.
The safer path is to focus every question on essential job functions:
- Ask “Can you climb ladders and work at heights for extended periods?” instead of asking about a specific diagnosis.
- Ask “Can you lift 50 pounds repeatedly during a shift?” rather than asking what medications a candidate takes.
- If a candidate volunteers medical information, note it factually, avoid follow-up questions about diagnosis or treatment, and route any accommodation discussion to HR after a conditional offer.
- Document every interview decision and scoring rationale so you have a clear, consistent audit trail if a decision is ever challenged.
Scoring, shortlisting, and comparing candidates objectively
A weighted scoring matrix turns interview notes into a decision you can defend. List the competencies tied to the role, assign each a weight, and rate every candidate on the same 1 to 5 scale used in the interview itself. A craft position might weight hands-on technical skill and safety judgment most heavily, a foreman might weight leadership and communication alongside technical knowledge, and a project manager role might weight planning, budget control, and stakeholder communication above trade-specific skills.
- Assign weights before interviews begin, never after seeing results.
- Score each competency independently rather than forming one overall impression.
- Hold a short panel calibration meeting to reconcile any scores that differ by more than one point.
- File the completed matrix with the candidate record as the documented basis for the hiring decision.
This approach mirrors the logic behind Qualifications Based Selection, which recommends choosing on demonstrated competence and documented criteria rather than price or gut feel alone.
Pro Tip: Give each interviewer five minutes to score independently before the panel discusses anyone, so early opinions do not sway the whole room.
Onboarding verification and continuous screening after hire
A pre-employment check is a snapshot, not a guarantee, and treating it as the final word leaves gaps that surface months later on a live jobsite. A structured 30/60/90-day cadence, tied directly to what the candidate claimed in the interview, closes that gap.
- At 30 days, confirm licenses, certifications, and OSHA training match what was stated in the interview.
- At 60 days, verify performance against the specific scenarios discussed, such as how the person handled a real safety call or schedule conflict.
- At 90 days, complete a formal review comparing interview scores to observed performance and flag any mismatch for future interview refinement.
- On an ongoing basis, rescreen licenses, monitor for new criminal or driving record issues where relevant, and confirm continued compliance with drug testing policy.
Assign a specific person, not a department, to own each checkpoint, and feed the results into performance reviews. Our background check compliance playbook covers the screening side of this cadence in more depth.
How R. Construction Solutions applies this process in placements
The scenario-based, prequalification-driven process described is used to support placements of office staff, field personnel, and subcontractors in the AEC industry. In a typical engagement, a client’s role requirements become interview scenarios, subcontractor candidates are run through a ConsensusDocs-style prequalification pass, and the placement carries through a 90-day verification window under the firm’s prorated payment structure, so clients pay based on results rather than promises.
— Rowena
Put this workflow to work with R. Construction Solutions
You do not have to build this entire process alone. R. Construction Solutions offers Recruiting Services for office and field roles, along with sourcing for pre-vetted subcontractors and suppliers through Supplier Sourcing and Subcontractor Connections, so you get candidates who already fit the scoring rubric described above.
Engagements typically use a prorated billing structure over the first 90 days, so clients pay based on placement outcomes rather than a flat upfront fee. If you also need introductions to new business partners or equipment rental relationships, the Business Opportunity Sourcing service handles those connections directly. Start by reviewing your open roles and reaching out through the recruiting services page to scope your first placement.
Sources
- Subcontractor Statement of Qualifications Form | ConsensusDocs 721
- EEOC sues Wrightway Ready-Mix and Wright Concrete & Construction for disability discrimination | EEOC
- Qualifications Based Selection of Contractors FINAL | AGC
- Check your hiring blind spots before they cost you | Construction Executive
FAQ
When should subcontractor prequalification happen in the hiring timeline?
Prequalification should happen before bidding or contract negotiations begin, not after a subcontractor is already selected. Using a standard form like ConsensusDocs 721 early lets you compare EMR, bonding, and financials across every bidder on the same basis.
How do I ask about physical job demands without violating the ADA?
Frame every question around essential job functions, such as lifting limits or working at height, rather than asking about a diagnosis or medication. EEOC guidance and a recent enforcement action against a concrete construction employer show that medical or medication-related questions before a conditional offer carry real legal risk.
What weighting should I use for scoring construction candidates?
Weighting depends on the role: craft positions typically weight technical skill and safety judgment highest, while foreman and project manager roles add more weight for leadership and communication. There is no single fixed formula, so build weights from the essential tasks of the specific role before interviews begin.
How often should I reverify licenses and certifications after hire?
A practical cadence checks credentials at 30, 60, and 90 days after hire, tied directly to claims made in the interview, then continues on an ongoing basis for licenses, safety training, and drug testing policy compliance. Continuous screening catches lapses that a one-time pre-employment check cannot.
Can R. Construction Solutions help with subcontractor sourcing, not just hiring?
Yes, R. Construction Solutions offers Supplier Sourcing and Subcontractor Connections alongside its recruiting services, connecting clients with pre-vetted partners in addition to placing office and field staff. Pricing for these services is available on request.
