GSA Schedules

Professional Services Schedule (PSS) #GS-00F-0001R*

*PSS is a Consolidated Schedule that includes:

  • GSA Mission Oriented Business Integrated Services (MOBIS)
  • GSA Professional Engineering Services (PES)
  • GSA Environmental Services (MAS 899)

effective 10/01/04 + three 5-year Option Periods

OPTION 1: APRIL 1, 2008 – MARCH 31, 2013

OPTION 2: APRIL 1, 2013 – MARCH 31, 2018

OPTION 3: APRIL 1, 2018 – MARCH 31, 2023

SINs 871-1, 871-1RC, 874-1, 874-1RC, 899-1, 899-1RC, 899-8, 899-8RC 

The GSA PSS Schedule is a consolidate contract vehicle offered to Federal clients seeking management, engineering or environmental services for their Federal mission. The contract is officially known as the Professional Services Schedule (PSS) #GS-00F-0001R Contract, but is frequently referred to as either the GSA MOBIS (Management Services) or Schedule 874 Contract,  PES (Professional Engineering Services) or Schedule 871, or Professional Environmental Services or Schedule 899. Improvement has become the watchword in government—improvement in performance, quality, timeliness, efficiency, and cost. Accountability to customers is essential, and change is continuous, affecting the entire organization and everyone in it. GEM has extensive experience in guiding and assisting clients through a wide range of mission-oriented business integrated engagements. We offer products and services in all subject areas covered in the GSA PSS Federal Supply Schedule.

Online access to contract ordering information, terms and conditions, up-to-date pricing, and the option to create an electronic delivery order are available through GSA Advantage!®, a menu-driven database system.

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