How to Build a Security Policy for Contractors

Contractors, vendors, and external partners often need access to an organization's applications, systems, and data to complete their work. However, giving external users broad or permanent access can increase an organization's security exposure.

A well-designed contractor security policy should follow a simple principle:

Give contractors the access they need, for only as long as they need it, and remove it when the work is complete.

This approach helps organizations balance productivity with security.

Why Contractor Access Needs Special Attention

Unlike permanent employees, contractors may work for limited periods, support specific projects, or require access to only a small number of applications.

If contractor access is not properly managed, organizations may face risks such as:

• Excessive access permissions

• Unused accounts remaining active

• Unauthorized access to sensitive systems

• Unmanaged or insecure devices

• Uncontrolled data transfers

• Difficulty tracking contractor activity

A contractor security policy helps establish clear requirements before access is provided.

Follow the Principle of Least Privilege

Contractors should receive only the permissions required to perform their assigned responsibilities.

For example, a contractor working on a specific application may need access to that application but not to the organization's entire internal network.

This approach reduces the potential impact if an account or device is compromised.

Access should also be time-bound whenever possible. Instead of creating permanent access, organizations can define an expiration date based on the contractor's project or engagement period.

Use Application-Level Access With ZTNA

Zero Trust Network Access (ZTNA) can support a more controlled approach to contractor access.

Rather than giving contractors broad access to a corporate network, ZTNA can provide access to specific applications based on defined policies.

This can help organizations control:

• Which applications a contractor can access

• Which users are permitted to access them

• When access is available

• What security conditions must be met

The result is a more focused access model that aligns permissions with actual business requirements.

Establish Device Requirements

Access control should not focus only on the contractor's identity. The device being used to access company resources also matters.

Organizations can establish minimum device-security requirements using technologies such as Mobile Device Management (MDM) and Endpoint Protection Platform (EPP).

Depending on the environment, requirements may include:

• Supported operating systems

• Security software

• Current security updates

• Device encryption

• Screen-lock requirements

• Approved configurations

• Protection against malware and other endpoint threats

These requirements can help ensure that contractor devices meet the organization's security expectations before accessing business resources.

Control Data Movement With DLP

Access to an application does not automatically mean data should be freely copied or transferred.

Data Loss Prevention (DLP) can help organizations monitor and control how sensitive information moves through approved endpoints and applications.

Depending on organizational policies, DLP controls can help address activities such as:

• Copying sensitive files

• Uploading information

• Printing documents

• Transferring data to removable media

• Sharing sensitive information through unauthorized channels

This adds another layer of protection around the information contractors may handle.

Contractor Onboarding Checklist

Security should begin before a contractor receives access.

A basic onboarding process should establish:

1. Verify the Contractor

Confirm the contractor's identity, organization, role, and business requirement for access.

2. Define Required Access

Document exactly which applications, systems, and data the contractor needs.

3. Set an Expiration Date

Access should have a defined end date based on the engagement or project timeline.

4. Check Device Requirements

Ensure the device meets the organization's security requirements before granting access.

5. Communicate Security Responsibilities

Contractors should understand relevant security policies, data-handling requirements, and reporting procedures.

6. Assign an Owner

Every contractor account and access request should have a responsible internal owner.

Contractor Offboarding Checklist

Offboarding is just as important as onboarding.

When a contractor's engagement ends, organizations should:

• Disable or remove user accounts

• Revoke application access

• Remove VPN or ZTNA permissions

• Revoke credentials and authentication tokens where appropriate

• Recover company-owned devices and assets

• Remove access to shared resources

• Review recent activity when necessary

• Confirm that the offboarding process is complete

Where possible, access should expire automatically rather than depending entirely on someone remembering to remove it manually.

Monitor Contractor Activity

Providing access is only one part of the process.

Organizations should also maintain appropriate visibility into contractor activity. Monitoring can help security teams identify unusual access patterns, unexpected data movement, or activity outside the contractor's normal responsibilities.

The objective is not to monitor every action unnecessarily. It is to maintain enough visibility to identify potential security issues and support incident investigation.

Build a Complete Contractor Security Framework

A strong contractor security policy can combine multiple security controls:

ZTNA → Controls application access
MDM → Establishes device requirements
EPP → Protects endpoints
DLP → Controls sensitive-data movement
Monitoring → Provides visibility into activity

These controls address different parts of the contractor-access lifecycle and can work together as part of a broader security strategy.

Make Access Temporary and Accountable

Contractor access should not become permanent simply because removing it was forgotten.

Every contractor account should have:

• A defined business purpose

• A designated internal owner

• Appropriate access permissions

• A clear expiration date

• Defined security requirements

• An offboarding process

This creates accountability throughout the contractor lifecycle.

A Practical Starting Point

Organizations can begin by creating a simple contractor onboarding and offboarding checklist.

Assign an owner to the checklist and make sure it covers:

Identity → Access → Device → Data → Monitoring → Expiration → Offboarding

The goal is straightforward: contractors should have enough access to complete their work, but no more access than necessary—and that access should not continue after the work ends.