Migrate from Field service software to Mailchimp

The core migration object. Every field service contact — including name, email, phone, address, company, and custom properties — becomes a Mailchimp audience member. The API connection is read-only, so your FSM account remains fully operational throughout migration. Duplicate email addresses are flagged and held before import so each Mailchimp member has a unique address.

Direct one-to-one mapping. Mailchimp's standard FNAME merge field receives the contact's first name directly without transformation. If the source record has an empty first name field, the merge field is populated as blank, which Mailchimp displays as an empty string in personalized subject lines.

Direct mapping. Mailchimp's standard LNAME merge field receives the contact's last name value. Single-name records — where only a first name is present — result in a blank LNAME field. Mailchimp handles this gracefully in personalization tokens by omitting the blank field.

Email address serves as both the source contact property and Mailchimp's primary key for audience members. Each member record requires a valid, unique email address. Contacts in the FSM that lack a valid email address are excluded from the primary import and held in a separate file for your team to review and manually correct before retrying.

Direct mapping where a PHONE merge field already exists in the Mailchimp account. If the Mailchimp account does not have a PHONE field configured, FlitStack creates it as a text merge field type before beginning the contact import to ensure phone numbers are preserved on every record.

FSM address components — street, city, state or province, postal code, and country — are consolidated into Mailchimp's structured ADDRESS merge field. This transformation enables Mailchimp's native address personalization token and supports location-based audience segmentation for geographically targeted campaigns.

Mailchimp does not include a native company field on audience members by default. The FSM company name is mapped to a custom COMPANY text merge field, which FlitStack creates in your Mailchimp account before the import begins. Company names containing special characters or international characters are preserved exactly as they appear in the source record.

Tags applied to FSM contacts — such as 'Commercial', 'HVAC Contract', 'VIP', or 'Referral' — transfer as Mailchimp Tags on the corresponding audience member record. Tags in Mailchimp are additive and non-exclusive, meaning a single contact can carry any number of tags simultaneously. Tag names exceeding 50 characters are flagged and trimmed to fit Mailchimp's limit.

FSM customer categories map to Mailchimp Groups when the FSM assigns a single-value classification per contact. Groups appear as interest categories in Mailchimp's preference center, allowing contacts to manage their own subscriptions. For FSM systems using multi-value categories, we advise collapsing to a primary group assignment to avoid group proliferation.

Job records, work orders, technician assignments, parts used, and resolution notes have no equivalent in Mailchimp's audience model. These records remain in the source field service system permanently. Customers requiring historical job context in Mailchimp can designate a single 'last service date' or 'job count' custom text merge field for migration before the project begins.

Invoice records, payment status, outstanding balances, and billing history do not migrate to Mailchimp. Mailchimp's data model is contact-centric and contains no transaction or accounting objects of any kind. All financial records must remain in your field service software or an integrated accounting system for ongoing operations.

FSM custom contact fields — such as 'Sprinkler System Type', 'Contract End Date', or 'Equipment Model' — are mapped to Mailchimp custom merge fields. Text fields create Mailchimp text merge fields, and number fields create number merge fields for arithmetic operations. Date fields from the FSM are stored as text strings in YYYY-MM-DD format since Mailchimp has no native date field type for service dates.