How to Hire a Sales Development Representative (SDR)

To hire a sales development representative who books real pipeline, screen for coachability and resilience before anything on the resume, test outbound ability with a short assessment and a live mock call, and score every candidate against the same structured scorecard. Most SDR hiring goes wrong because the decision leans on a polished interview and a gut read, and those are the two weakest predictors of who actually performs.

A strong SDR is the engine of your pipeline. They find accounts, run cold outreach, qualify leads, and hand account executives conversations worth having. A weak one burns your prospect list, misreports interest, and quits inside a year. This guide covers what the role really is, the traits that separate a top performer from an average one, where to source candidates, how to test them before an offer, and what the hire costs.

TL;DR

• Hire for coachability, resilience, and communication first. You can teach a CRM and a script in weeks, but you cannot coach drive into someone who lacks it.
• Test ability, do not just interview it. A sales aptitude assessment plus a live mock cold call tells you more than an hour of polished answers.
• Score candidates on a structured scorecard tied to the competencies the role needs, so every person is measured on the same evidence.
• Sourcing still works best through referrals, sales communities, and your own team, backed by targeted job posts.
• Budget for base plus commission and the real cost of a mis-hire, since SDR turnover runs high and a slow-ramping quit is expensive.

What does a sales development representative do?

A sales development representative (SDR) owns the top of the sales funnel. They research target accounts, run outbound prospecting through calls, email, and social outreach, qualify inbound leads, and book qualified meetings for account executives. An SDR does not close deals. Their one job is to create pipeline the closing team can actually work.

The role is demanding and repetitive. High-performing reps make 40 or more dials a day, live with constant rejection, and still keep their energy up on the next call. That reality shapes who succeeds: the job rewards stamina and a short memory for “no” far more than a slick resume. Sales is also one of the biggest areas of job growth worldwide, and the World Economic Forum Future of Jobs Report 2025 expects 39% of core work skills to change by 2030, so the best candidates have options and keep leveling up.

SDR vs BDR: what’s the difference?

The titles overlap and vary by company, so define them before you write the job post. In most teams an SDR qualifies inbound leads and warmer prospects, while a business development representative (BDR) runs pure outbound into cold, net-new accounts. Both feed pipeline to account executives, and both need the same core traits: outbound stamina, disciplined research, and calm objection handling. If your motion is mostly outbound, screen harder for cold-calling grit whatever you call the role.

What skills should you look for in an SDR?

Five traits separate a top-performing SDR from an average one. None of them show up reliably on a resume, which is why you have to test for them.

• Coachability. The single best predictor of ramp speed. A rep who takes feedback and applies it by the next call will outgrow a more experienced one who cannot.
• Resilience. Rejection is the job. Look for candidates who can point to a real setback they pushed through, at work, in sport, or in service.
• Communication. Clear, concise, and quick on their feet. An SDR has seconds to earn a prospect’s attention on a cold call.
• Organization. Top reps juggle dozens of open leads and follow-ups without dropping any. Ask how they plan a day.
• Drive. Curiosity about the product, the buyer, and the craft of selling. Drive sets the ceiling; the rest is trainable.

Hire for attitude over experience, especially at entry level. A new rep learns your CRM, your sequences, and your product inside a few weeks. Changing someone’s temperament takes far longer, and usually does not happen at all.

Pro Tip: Ask every candidate for one number from their last role, quota attainment, meetings booked per week, or connect rate. Strong SDRs track their own metrics without being asked. A candidate who cannot recall a single figure rarely runs a disciplined outbound day.

Where can you find top SDR candidates?

The best candidates are usually employed and not scanning job boards. Reach them through a mix of channels rather than one posting.

• Referrals. Your own reps know other good reps. A referral bonus is the cheapest quality pipeline of candidates you will find.
• Sales communities. Groups like RevGenius, Sales Hacker, and Pavilion are full of ambitious reps trading notes and open to the right move.
• Your existing team. A support rep, an inbound coordinator, or a recent grad with the right temperament often outperforms an external hire who needs no training on the product but plenty on grit.
• Targeted job posts. Professional networks and job boards widen the funnel. Write the post for the outcome (booked meetings, pipeline) rather than a list of tools.

Modern outbound is increasingly remote and hybrid, which widens your talent pool geographically. McKinsey reports that 85% of B2B organizations expect hybrid selling to be their main model within three years, so a great remote SDR is a viable hire, not a compromise.

How do you assess an SDR before hiring?

This is where most teams lose the plot. They run four conversational interviews and hire the most likeable person in the room. Likeability is not the job. Decades of selection research make the point plainly: structured interviews and work-sample tests are among the strongest predictors of job performance, well ahead of unstructured chats and resume screening, as summarized in selection-science research from Sackett and colleagues.

The fix is to score the competencies that predict success, using evidence instead of impressions. That is the idea behind the Testlify Competency-to-Evidence Matrix: you start with the role, map each competency that matters to a measurable source of evidence, then evaluate every candidate the same way. For an SDR, the matrix keeps the process honest and comparable across a large applicant pool. A practical version looks like this.

Run the low-cost filters first. A short SDR assessment at the top of the funnel screens for drive and reasoning before anyone spends interview time, then the mock call and written task confirm the ability the assessment predicts. Testlify’s pre-hire assessments for sales roles and a short conversational AI interview let you score a large pool consistently and shortlist on evidence, not guesswork. Keep the final decision human: the data narrows the field, a hiring manager makes the call.

One more discipline that pays off: make the interview itself structured. Same questions, same order, same scoring guide for every candidate. It removes the halo effect and makes two interviewers’ notes actually comparable.

What should you ask an SDR in interviews?

Ask questions that surface evidence, not rehearsed lines. A few that work:

• “Walk me through how you would research and open a cold account in this industry.” Tests preparation and outbound instinct.
• “Tell me about a target you missed. What did you change?” Tests resilience and self-awareness.
• “Sell me on your last product in 60 seconds.” Tests clarity under pressure.
• “What metrics did you track last quarter, and what were they?” Tests discipline and honesty.
• “I am a prospect who just said I am not interested. Go.” Tests live objection handling.

Score each answer against your scorecard as they speak. The goal is a defensible, evidence-based decision you could explain to the candidate, the team, and a regulator.

How much does it cost to hire an SDR?

Plan for two costs: the package and the mis-hire risk. SDR pay is base plus commission, and it varies widely by market and experience. For context on the broader sales-rep market, the U.S. Bureau of Labor Statistics projects about 142,100 sales-rep openings a year through 2034, most of them to replace people leaving the field, and puts the median wage at $66,780 even as total employment grows only about 1%. High churn means demand for good reps stays hot and competition for them is real.

The bigger number is the cost of getting it wrong. Most SDRs need a 90-day ramp before they hit full productivity, so one who ramps slowly and quits soon after can burn several months of salary plus the pipeline they never built and the manager time spent coaching a bad fit. That is exactly why front-loading the assessment is the cheapest insurance you can buy: a few minutes of testing up front is far cheaper than a replacement search in month four.

Here is what that risk looks like in stages, using the BLS median SDR-adjacent wage above as the baseline. The Testlify Cost-of-Mis-Hire Model breaks a bad hire into four exposure windows instead of one lump “replacement cost” figure, so you can see exactly where a screening gap turns into a bill.

Read the table left to right and the case for testing before the offer makes itself: every stage after sourcing gets more expensive to reverse, and the two cheapest levers, an aptitude test and a mock call, sit at the very start.

Hire your next SDR on evidence, not gut feel

Testlify lets you screen SDR candidates for drive, cold-outreach ability, and coachability before the first interview, then shortlist on scores instead of resumes. Start a free trial or book a demo to see the sales assessment library and structured scorecards in action.

Key takeaways

• Attitude beats resume at entry level. Coachability, resilience, and drive predict ramp speed better than years of experience, because the mechanics of the job are trainable in weeks and the temperament is not. Screen for the traits, teach the tools.
• Test ability, do not just interview it. Structured interviews and work samples are among the strongest predictors of performance, so a sales aptitude assessment plus a mock cold call will out-predict four friendly conversations every time.
• Use a competency-to-evidence scorecard. Mapping each SDR competency to a measurable test keeps a large applicant pool comparable and your final decision defensible, which matters more as hiring volume grows.
• Source where employed reps actually are. Referrals, sales communities, and internal moves beat a lone job post, because the strongest SDRs are rarely on the open market.
• Price in the mis-hire, not just the salary. With sales turnover high and a slow-ramping quit costing several months of pay, front-loading assessment is the cheapest way to protect the budget.
• Keep the decision human. Assessments and AI insights narrow the field and remove bias from the first cut, but a hiring manager owning the final call is what keeps the process fair and accountable.

For a deeper look at building a sales screening process, explore Testlify’s guide on candidate skills testing.

Frequently asked questions (FAQs)