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Cover letter example

Business Development Manager Cover Letter Example

A managing partner hiring for business development reads for new clients, closed revenue and partnerships that bring work in. This letter opens on new clients won, then shows bid wins and referral partners, and ties them to a firm about to open its second office.

Mid career · 261 words · Last reviewed 4 November 2026 · 3 min read · How we write these

The job this letter answers

Business Development Manager, Quillfield Consulting Group

A 120-person management consulting firm in Boston working with mid-size manufacturers. It opens a second office in Hartford next year and is starting its first formal referral partner program.

  • Build a qualified pipeline through outreach, referrals and events
  • Win new clients and close new yearly revenue
  • Lead proposals with delivery teams
  • Develop partnerships that bring new leads
Template

The letter takes the colors of the resume template, the same way a downloaded cover letter matches your resume.

Evelyn Marchetti

Boston · evelyn.marchetti@example.com

4 November 2026

Mr. Daniel Okafor

Managing Partner

Quillfield Consulting Group

Subject: Application for Business Development Manager

Dear Mr. Okafor,

Eleven new clients signed with us in the last year, worth $1.1 million in new yearly revenue, and over the same period I built a qualified pipeline of $2.4 million. I want to do the same work at Quillfield Consulting Group as your Business Development Manager.

About a fifth of my new leads now come through three referral partnerships I set up; the rest come from my own outreach and from events. When a lead turns into a bid, I write the proposal with the delivery team rather than for them, and we have won four of the last seven competitive bids. Every opportunity sits in the sales system with its next step, so the partners see a monthly forecast they can plan around.

Quillfield's plan for its first formal referral partner program is the main reason I am applying. Developing partnerships that bring new leads is the part of business development I have built from nothing, and choosing partners, agreeing how referrals pass between firms and reporting back to them is work I enjoy. The new Hartford office will also need a pipeline started cold, which is how I began: as an associate I researched and contacted about 80 target accounts a quarter and booked 15 first meetings a quarter for senior partners.

Ahead of an interview, I am glad to draft a one-page outline of how I would choose the first referral partners for the Hartford office, using whatever you can share about the clients you want there. Which services do your partners most want that office to sell?

Sincerely,

Evelyn Marchetti

A made-up letter. The person, the employers and every number are invented, and any resemblance to a real one is chance. Sending it by email? Put the subject line in the email’s subject box, add your name to it, and attach the letter as a PDF.

Paragraph by paragraph

  1. The opening

    Starts: “Eleven new clients signed with us in…”

    Leads with clients and revenue closed, then gives the pipeline as a separate figure, so a partner sees both results without reading one as a conversion rate.

  2. Your strongest evidence

    Starts: “About a fifth of my new leads…”

    Answers the pipeline, proposal and new-client lines with lead sources, a bid record and the system habit that keeps the forecast reliable.

  3. Why this employer

    Starts: “Quillfield's plan for its first formal referral…”

    Gives two reasons drawn from the firm's own plans, the referral program and the new office, and answers the partnership line in the advert's words.

  4. The close

    Starts: “Ahead of an interview, I am glad…”

    Offers a short piece of work shaped to the firm's plans and ends on one question a managing partner will want to answer.

Why this letter works

  • Clients won and revenue closed open the letter, the two figures a managing partner checks first.
  • The pipeline is broken down by source, with referral partners given their own share.
  • Both reasons for choosing the firm come from its own plans, so the paragraph could not be sent to another employer.
  • The close offers a short piece of work aimed at the new office rather than a general chat.

How to write your own business development manager cover letter

  1. Report closed revenue and pipeline as two separate figures from the same period, not as a ratio.
  2. Break your lead sources down, even roughly, so the reader sees which channels you built yourself.
  3. Say how you work with delivery teams on proposals; consulting partners want sellers who scope honestly.
  4. If the firm is opening an office or a new practice, explain how you would fill its first pipeline.
  5. Offer a one-page plan for a named market instead of a general request to talk.

Common questions

Should a business development letter quote a win rate on bids?

Quote it as a count over a recent period, such as four of the last seven, so the reader knows how many bids sit behind it. A percentage on a handful of bids can look bigger than it is.

How do I describe partnerships without naming partner firms?

Describe them by type and by what they bring: how many partners and what share of new leads they supply. Partner names can wait until both firms agree.

Can a pipeline figure mislead a hiring partner?

It can if it reads as a promise. Say qualified, give the period, and report closed revenue separately so the two are not taken as one conversion rate.

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