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Purchasing Administrative Assistant

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Onsite

Purchasing Administrative Assistant

Dynamic Systems (DSI), LLC

Purchasing Administrative Assistant

Skills

Compliance

2 months ago

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Important information


Contract type:

Permanent

Location:

San Antonio, TX, USA

Work mode:

Onsite

Published on:

1 September 2026

What they need


Position Summary

The Purchasing Administrative Assistant supports the procurement function within a mechanical

contracting company by coordinating purchasing activities, maintaining accurate records, and

ensuring timely delivery of materials and services. This role plays a critical part in supporting

project timelines by assisting with vendor communication, purchase order processing, and

documentation related to mechanical construction projects (e.g., HVAC, plumbing, piping

systems).

Key Responsibilities

  • Assist in creating, issuing, and tracking purchase orders for materials and equipment.

  • Maintain and update vendor databases, pricing lists, and procurement records.

  • Communicate with vendors to obtain pricing, availability, and delivery timelines.

  • Track material deliveries to ensure alignment with project schedules and site

requirements.

  • Coordinate with project managers, estimators, and field personnel to understand job

specific material needs.

  • Review purchase requisitions for accuracy and completeness prior to order placement.

  • Resolve discrepancies related to invoices, deliveries, or damaged materials.

  • Assist in negotiating pricing or identifying cost-saving opportunities when applicable.

  • Maintain organized electronic and physical filing systems for purchase orders, contracts,

and vendor documentation.

  • Support inventory tracking and coordination with warehouse or job site logistics.

  • Generate procurement reports and assist in budget tracking for projects.

  • Ensure compliance with company policies, safety standards, and contractual requirements.

FLSA – Non-Exempt

Qualifications

  • High school diploma or equivalent required; associate or bachelor’s degree in business,

construction management, or related field preferred.

  • 1–3 years of administrative or purchasing experience, preferably in construction or

mechanical contracting.

  • Familiarity with construction materials (HVAC, plumbing, piping, fittings, etc.) is a plus.

  • Proficiency in Microsoft Office (Excel, Outlook, Word) and purchasing or ERP software.

  • Strong organizational skills with high attention to detail.

  • Ability to manage multiple priorities in a fast-paced, project-driven environment.

  • Effective communication and interpersonal skills.

  • Basic understanding of construction project workflows and terminology preferred.

  • Problem-solving mindset with ability to handle vendor or delivery issues proactively.

Key Performance Indicators (KPIs)

  • Purchase Order Accuracy Rate: Percentage of error-free purchase orders issued.

  • On-Time Material Delivery Rate: Alignment of deliveries with project schedules.

  • Cycle Time for PO Processing: Speed from requisition to issued purchase order.

  • Invoice Discrepancy Rate: Number of billing issues or mismatches resolved.

  • Vendor Response Time: Efficiency in obtaining quotes and confirmations.

  • Cost Efficiency: Contribution to savings through price comparisons or vendor sourcing.

  • Document Organization & Compliance: Accuracy and completeness of procurement

records.

Work Environment

  • Primarily office-based within a construction or corporate office setting.

  • Frequent coordination with field personnel, warehouses, and job sites.

  • May require occasional site visits to understand material needs and logistics.

  • Fast-paced environment driven by construction project timelines and deadlines.

  • Standard business hours with occasional extended hours depending on project demands.

  • Collaborative team environment involving operations, project management, and

accounting teams.

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