Parcel Spend You Can
Actually Defend 

Small package shipping tends to get managed on autopilot — the same carrier contracts renewed year over year, invoices processed without scrutiny, and rate structures that haven't been challenged since the last time someone had bandwidth to look. That's where parcel programs quietly get expensive, and where Mariner finds the money. 
Mariner's parcel advisory work combines contract negotiation, invoice auditing, and shipment-level data analysis to give you a clear picture of what your small package network actually costs and what it should cost. Most clients don't know those numbers are different until we show them side by side. 

What Mariner Brings to Your Parcel Program 

Contract Negotiation

Carrier agreements are built to favor carriers. We bring the data and the leverage to renegotiate rates, accessorials, and incentive thresholds on terms that reflect your actual volume and shipping profile. 

Invoice Auditing

Billing errors, duplicate charges, and misapplied accessorials are common and rarely caught without a systematic review. We audit your parcel invoices to recover what you've already overpaid and prevent it from recurring. 

Spend Analysis

Mariner Live surfaces your parcel data across carriers, zones, service levels, and weight breaks so you can see exactly where spend is concentrated and where optimization opportunities exist. 

Carrier Diversification

Single-carrier dependency creates rate exposure and service risk. We help you build a small package strategy that uses carrier competition to your advantage without adding operational complexity.