SDR (Sales Development Representative)

An SDR (Sales Development Representative) is the sales role responsible for the first stage of the funnel: taking the leads that come in (mostly through marketing, such as forms, downloads or website inquiries), contacting them quickly, qualifying whether they make sense and booking a meeting so an account executive can take it to close. The SDR's output is not a closed sale but a qualified meeting that is worth having.

The key to the role is specialization: instead of asking a single person to prospect, qualify, demo, negotiate and close, the model separates "opening" from "closing". The SDR opens with volume and speed of response; the account executive closes with focus. All that activity (contacts, attempts, lead qualification and handoffs) is logged in the CRM, which is where Sellium organizes the sales team's work so the funnel reflects reality and not each rep's gut feeling.

In Latin American practice the title coexists with BDR, and many small companies use them almost as synonyms. The distinction that matters is not the job title but where the lead comes from: the classic SDR handles demand that has already arrived (inbound), while the BDR goes out to generate new demand cold (outbound).

The SDR role grew out of a simple idea that changed how B2B sales teams are built: asking a rep to handle the whole cycle (find, qualify, demo, negotiate and close) is inefficient, because each part requires different skills and rhythms. Splitting the work into specialized roles lets each person become very good at one stage. The SDR specializes in the mouth of the funnel: responding fast, organizing the demand that comes in and turning vague interest into concrete meetings for the person who closes.

What an SDR does day to day

The SDR's work revolves around speed and discipline. Typical tasks are:

• Handling inbound demand: when a lead fills out a form, downloads a resource or writes on WhatsApp, the SDR is the first to respond, ideally within minutes. Speed to first contact is one of the factors that moves conversion the most.
• Qualifying the lead: understanding whether the company fits the ICP (ideal customer profile), whether there is a real pain, a budget and an available decision-maker. Here the SDR usually applies a framework such as BANT or MEDDIC so weak meetings do not get passed along.
• Working a cadence: leads do not always respond to the first touch, so the SDR runs a cadence of emails, calls and messages until a conversation happens.
• Booking and handing off: once the SDR confirms the lead qualifies, they book the discovery meeting and hand it to the account executive with the context logged in the CRM.

Why the role matters

The SDR solves a concrete problem that almost every growing company runs into: marketing generates more leads than reps can handle with care, and senior reps, who are expensive and focused on closing, end up wasting time filtering contacts that were never going to buy. Having an SDR layer means no lead goes cold for lack of a response and the account executive only spends time on meetings worth having. The result is a cleaner pipeline, shorter sales cycles and a healthier acquisition cost, because the expensive effort is concentrated where it really moves the needle.

A concrete example in Argentina

A company that sells management software to consumer goods distributors publishes a technical guide behind a form, and 60 leads come in within a week. Without an SDR, those 60 would land on the to-do list of two reps who are busy closing deals, and they would follow up late and poorly. With an SDR, every lead gets a response the same day. The SDR calls, rules out the students and competitors who are just browsing, identifies 14 distributors of the right size with a decision expected within the quarter, and books 9 meetings. Of those 9, the account executive opens 4 opportunities and closes 2. The value of the role is plain to see: the team learns it needs about 60 leads from that source to close 2 sales, and it can decide with data how much to invest in the next campaign.

SDR, BDR and account executive: who does what

The most frequent confusion is between SDR and BDR, and the real dividing line is the source of the lead, not the title.

In small teams one person often plays all three roles; as the business grows they are separated to gain efficiency. What does not change is the logic: the SDR opens, the account executive closes, and between the two there is a handoff that must be logged and auditable.

Common mistakes

Three traps sink an SDR team. The first is prioritizing volume over quality: booking lots of meetings that the account executive later rejects for poor fit creates noise, not pipeline. The second is responding late: an inbound lead that waits hours or days has already cooled off and is comparing you with the competition. The third is over-qualifying to hit the activity target, which erodes trust between marketing, SDRs and sales. The antidote to all three is the same: a qualification criterion agreed in writing, a metric that looks at accepted meetings and not just booked ones, and a CRM where every handoff is logged.