You find a DevOps engineer'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 checked. A guess is a coin flip you must verify.
DevOps engineers are hard to reach by cold email for two reasons. They sit below the management layer, so company sites and press pages rarely list them. And a bounce or an irrelevant email costs you sender reputation on the domain you send from.
Addresses come from four places. A data provider holds a work address it collected and checked. A company site lists a shared inbox, which is never the engineer's own. A name pattern gives you a guess. Open-source commit history sometimes exposes a personal address, which suits business outreach poorly.
Only the first is worth building a process around. This guide follows that ranking and uses the LeadOcean API. Every step has a request you can run.
TL;DR
- It takes about 15 minutes to size the audience, find one DevOps engineer's address and check its 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, no card, and 5 requests a second.
- 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 DevOps audience for free
Count how many DevOps engineers 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=DevOps Engineer" \
--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 very wide filter can come back as a floor.
There is no level filter in this count on purpose, so every level is counted. Adding jobLevel=Director would narrow it to people at Director level whose title still contains the phrase.
Step 2: Find the engineers 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": ["DevOps Engineer", "Site Reliability Engineer", "Platform Engineer"],
"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. Read the title before you pick one.
The same job goes by many names: DevOps Engineer, SRE, Platform Engineer, Cloud Engineer, Infrastructure Engineer. Size each spelling with count=true first so you spend records only on the ones that return people.
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. If you only want a deliverable work address, 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: $LEADOCEAN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"person_id": "PERSON_ID_FROM_STEP_2", "reveal_email": true}' \
| jq -r '.data.contact_data
| select(.email_status | IN("verified","catch_all_valid","catch_all"))
| .contact_emails[0].email'Empty output means the status failed the filter. LeadOcean gives no refund for bounced emails, so this check is your only protection. Treat catch_all as sendable at low volume, not as proof.
Step 5: Fall back to a name pattern
When the data holds no address, build candidates from the engineer's name and the company domain. These four shapes are common. Pick the one you can confirm from a known address at the same company.
| Pattern | Example for Jane Doe at Acme |
|---|---|
| first | jane@acme.com |
| first.last | jane.doe@acme.com |
| first initial, last | jdoe@acme.com |
| first initial dot last | j.doe@acme.com |
first="jane"; last="doe"; domain="acme.com"
printf '%s\n' "$first@$domain" "$first.$last@$domain" "${first:0:1}$last@$domain" "${first:0:1}.$last@$domain"You only learn a company's shape from a confirmed address. Never send to a candidate you have not verified. Run each one through an email verifier you trust first. 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 DevOps engineers (verified, catch_all_valid or catch_all, the tool default), not every one we hold. The filter is title DevOps Engineer with no level filter. Titles match as keywords, so read a sample before you send.
| Region | Mailable DevOps engineers | All matching, any email status | Exact |
|---|---|---|---|
| NORAM | 19,023 | 57,056 | Yes |
| EMEA | 22,113 | 67,888 | Yes |
| APAC | 17,467 | 68,934 | Yes |
| LATAM | 2,549 | 8,209 | Yes |
| Worldwide | 63,735 | 210,301 | Yes |
The four regions add up to less than the worldwide row because some people have no region on file. The worldwide count spans 19,667 distinct employers.
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": { "profile_full_name": "Jane Doe", "profile_headline": "DevOps Engineer at Acme" },
"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 pick a paid plan on pricing. |
| 429 | More requests a second than the plan allows: 5 on Free, 200 on Agency. | Wait the Retry-After seconds and retry. |
| Empty results | A filter value is not an exact enum string, such as Staff Level for Staff. | 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 a DevOps engineer 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 DevOps engineers can I get on the free plan?
You have 1,000 records, one-off. Each engineer costs about 2: 1 from search and 1 from the reveal. That is roughly 500 engineers, 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.
Should I target SREs and platform engineers too?
Often yes. The buyer for infrastructure tooling can hold any of those titles. Size each one with count=true and compare before you commit records.
For the same recipe on other titles, see Security Engineer, VP of Sales and VP of Marketing. More recipes live in the blog hub. Plans are on pricing.
Size your DevOps list free, then pull verified addresses
Free to start. No credit card. 1,000 records to spend whenever you like.
Get your free API key →