You find an Engineering Manager's email by looking it up in a data source first and guessing from a name pattern only when the lookup is empty. A lookup returns an address someone has already tested. A guess is a coin flip you must verify.
Engineering Manager emails come from four places. A data provider holds a work address it collected and tested. A company site lists a shared inbox such as engineering@acme.com, which is not the manager's own. A name pattern gives you a guess. A personal address sits in some records but suits business outreach poorly.
Only the first is worth building a process around. This guide follows that ranking and uses the LeadOcean API, so every step has a request you can run.
TL;DR
- It takes about 15 minutes to size the audience, find one Engineering Manager and check the address status.
- The walkthrough spends about 4 records: up to 3 from the search and 1 from the reveal. Counts are free.
- Send only to
verified,catch_all_validorcatch_all. Anything you guessed gets verified first.
Prerequisites
- A LeadOcean API key from app.leadocean.io. The free plan has 1,000 records, one-off, and no card.
- The key in your shell as
$LEADOCEAN_API_KEY. curlandjq.- A target company domain. The examples use
acme.com.
export LEADOCEAN_API_KEY="paste-your-key-here"Step 1: Size the Engineering Manager audience for free
Count how many Engineering Managers you can mail before you spend a record. Send count=true and limit=1 as query parameters. Arrays go comma-separated.
curl -s -G https://api.leadocean.io/v1/people/search \
-H "x-api-key: $LEADOCEAN_API_KEY" \
--data-urlencode "title=Engineering Manager" \
--data-urlencode "jobLevel=Manager" \
--data-urlencode "salesRegion=EMEA" \
--data-urlencode "emailStatus=verified,catch_all_valid,catch_all" \
--data-urlencode "count=true" \
--data-urlencode "limit=1" | jq '.meta | {total, totalIsExact, countOnly}'salesRegion takes NORAM, LATAM, EMEA or APAC. Swap in country=DE for one market. REST meta.total stops at 100,000, so a wide filter can return a floor with totalIsExact false.
Step 2: Find the Engineering Manager at your target company
Search by company domain and title. The search returns a thin row with no address in it. The row carries a person_id and flags that say whether we hold an email.
curl -s https://api.leadocean.io/v1/people/search \
-H "x-api-key: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"domain": ["acme.com"],
"title": ["Engineering Manager"],
"jobLevel": ["Manager"],
"limit": 3
}' | jq '.data[] | {person_id: .meta.source_ids.person_id, contact_data}'Each person returned costs 1 record. Keep limit small. Title values are keywords, so a few rows may carry a neighbouring title such as Senior Engineering Manager. Read the title before you pick one.
The title is not standard. The same job appears as Engineering Manager, Software Engineering Manager, Development Manager or Head of Engineering. When one title returns nothing, filter on function instead: "jobFunction": ["Engineering"] with "jobLevel": ["Manager"]. Size it with count=true first.
Step 3: Reveal the address
Send the person_id to enrich with reveal_email set to true. Enrich takes exactly one of linkedin_url, email, phone or person_id. There is no name plus domain lookup, which is why Step 2 comes first.
curl -s https://api.leadocean.io/v1/people/enrich \
-H "x-api-key: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"person_id": "PERSON_ID_FROM_STEP_2", "reveal_email": true}' \
| jq '.data.contact_data | {email_status, contact_emails}'This costs 1 record. A person we hold nothing for is a 404 and costs nothing. For a deliverable work address only, GET /v2/people/email/work with the same person_id returns one current-employer address or null. It costs 1 record per call, even when it finds nothing.
Step 4: Read the status before you send
The status says how far to trust the address. verified was tested. catch_all_valid means we confirmed the mailbox on a domain that accepts everything. catch_all means the domain accepts everything and the mailbox is unproven.
curl -s https://api.leadocean.io/v1/people/enrich \
-H "x-api-key: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"person_id": "PERSON_ID_FROM_STEP_2", "reveal_email": true}' \
| jq -r '.data.contact_data
| select(.email_status | IN("verified","catch_all_valid","catch_all"))
| .contact_emails[0].email'Empty output means the status failed the filter. LeadOcean gives no refund for bounced emails, so this check is your only protection. Treat catch_all as sendable at low volume, not as proof.
Step 5: Fall back to a name pattern
When the data holds no address, build candidates from the manager's name and the company domain. Four shapes are common. Pick the one you can confirm from a known address at the same company.
| Pattern | Example for Jane Doe at Acme |
|---|---|
| first | jane@acme.com |
| first.last | jane.doe@acme.com |
| first initial, last | jdoe@acme.com |
| first initial dot last | j.doe@acme.com |
first="jane"; last="doe"; domain="acme.com"
printf '%s\n' "$first@$domain" "$first.$last@$domain" "${first:0:1}$last@$domain" "${first:0:1}.$last@$domain"A bad guess bounces, and a run of bounces hurts the domain you send from. Never send to a candidate you have not verified with an email verifier you trust. A domain that accepts all mail cannot confirm any single mailbox, so a guess there stays a guess.
What you get
Step 1 is free. We ran it on 2026-10-21 for each sales region with leadocean_count_leads. The counts are mailable Engineering Managers (verified, catch_all_valid or catch_all, the tool default), not every Engineering Manager we hold. The filter is title Engineering Manager with job level Manager. Titles match as keywords, so read a sample before you send.
| Region | Mailable Engineering Managers | All with that title, any email state | Exact |
|---|---|---|---|
| NORAM | 104,246 | 213,885 | Yes |
| EMEA | 36,822 | 99,910 | Yes |
| APAC | 34,771 | 86,130 | Yes |
| LATAM | 5,729 | 14,166 | Yes |
Roughly half of the Engineering Managers we hold carry a mailable address. The NORAM list spans 21,391 employers, so it is wide enough to segment by company size or industry before you pull anything.
A revealed person comes back in the shape below. This is the response shape from the API reference, with placeholder values.
{
"success": true,
"data": {
"profile_data": { "...": "name, title, company" },
"contact_data": {
"has_email": true,
"email_status": "verified",
"email_type": "work",
"contact_emails": [
{ "email": "jane.doe@acme.com", "type": "work", "status": "verified" }
]
}
}
}Troubleshooting
| Error | Cause | Fix |
|---|---|---|
| 401 | The x-api-key header is missing, or the key is wrong or revoked. | Copy a fresh key from the app and reload $LEADOCEAN_API_KEY. |
| 402 | Your records are spent. On Free the 1,000 are a one-off allowance and do not reset. | Check GET /v1/account, or move to a paid plan (Solo, $97 a month). |
| 429 | Requests above your plan's rate limit: 5 a second on Free, 200 on Agency. | Wait the Retry-After seconds and retry, or slow the loop. |
| Empty results | A filter value is not an exact enum string, such as Mgr for Manager. | Call leadocean_list_enum_values for job_level and pass the exact string. |
| 404 on enrich | We hold nothing for that person. | Nothing was charged. Try another person_id or fall back to Step 5. |
| Export refused | One export is capped at 50,000 rows a request and 500,000 rows a day. | Split the job across requests and days, or narrow the filters. |
FAQ
Is it legal to email an Engineering Manager you do not know?
Rules differ by country, and this guide is not legal advice. Check the law where your recipient sits and keep your message relevant to their role. Ask your own counsel about anything in doubt.
Why does the search not show the email?
Search returns a thin row with flags such as has_email and email_status. The address comes from enrich with reveal_email set, and that call costs 1 record.
How many Engineering Managers can I get on the free plan?
You have 1,000 records, one-off. Each manager costs about 2: 1 from search and 1 from the reveal. That is roughly 500 managers, minus any 404s that cost nothing.
Can I pull a whole region at once?
Yes, on a paid plan. The Exports page in the app takes the same filters, shows the record price before you start, and gives you a CSV. POST /v1/exports does the same by API, up to 50,000 rows a request. Bulk CSV export is not on Free.
Does the record show where the manager worked before?
Yes. Since 2026-10-17 person enrich returns career history in resume_data: past roles with title, company name and dates, plus education and certifications when held. Past employers carry no company_id yet. Use it to check that the person still runs the team you are writing to.
For the same recipe on adjacent roles, see VP of Engineering, IT Manager and Product Manager. More recipes live in the blog hub. Plans are on pricing.
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