How to Find a CIO's Email Address (2026)

You find a CIO'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 that you must verify.

CIO 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 rarely the CIO'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. The order of this guide follows that ranking.

CIOs have a second problem: the title is not standard. The same job appears as CIO, Chief Information Officer, Chief Digital Officer or Head of IT. Step 1 sizes the audience so you see which spelling returns people before you spend anything.

This guide 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 CIO'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_valid or catch_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.
• curl and jq.
• A target company domain. The examples use acme.com.

export LEADOCEAN_API_KEY="paste-your-key-here"

Step 1: Size the CIO audience for free

Count how many CIOs 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=CIO,Chief Information Officer" \
  --data-urlencode "jobLevel=C-Team" \
  --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 big region can come back as a floor with totalIsExact false.

Step 2: Find the CIO 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": ["CIO", "Chief Information Officer"],
    "jobLevel": ["C-Team"],
    "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.

Smaller companies often have no CIO. The top IT person is a Head of IT or IT Director. For those, swap the title filter for "jobFunction": ["Information Technology"] with "seniority": ["head", "director"]. Sizing with count=true first shows which version returns 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 CIO's name and the company domain. Most companies use one of four shapes. Pick the one you can confirm from a known address at the same company.

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"

Guessing is the weakest route for a CIO. Large IT organisations often run strict mail filtering, so a wrong guess is more likely to bounce. 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 2026-10-01 for each sales region with leadocean_count_leads. The counts are mailable CIOs (verified, catch_all_valid or catch_all, the tool default), not every CIO we hold. The filter is title CIO or Chief Information Officer with job level C-Team. Titles match as keywords, so read a sample before you send.

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

FAQ