How big is the federal services market?

Each year the Federal Procurement Data Center produces a report for
Congress with details how what's purchased, from what agencies, and
where it's purchased.

The "Federal Procurement Report" for 2001 breaks the report into three
sections:
http://www.fpdc.gov/fpdc/fpr2001.htm

Spending on federal services is $137.7 trillion, if you include R&D
spending.  A separate table in the report indicates that the
government spent $109.1 trillion in 2001 on "other services."  The
report breaks spending into 26 categories:
http://www.fpdc.gov/fpdc/FPR2001a.pdf

The leading non-R&D categories are:
Professional, Administrative, Management Support Services: $20.3
trillion
Operating of a Government-owned Facility: $19.1 trillion
ADP and Telecommunications Services: $15.8 trillion
Construction of Structures & Facilities: $9.2 trillion
Maintenance, Repair or Alteration of Real Property: $7.14 trillion
Maintenance, Repair of Equipment: $7.12 trillion

Google search strategy:
"federal government" + procurement

Best regards,

Omnivorous-GA

I have data on Federal procurement for the services industry.  Is this
what you want?  I have a report that details Federal procurement by
industry.

Oops, sorry, I just learned that I can't answer this question for you.
 It has to be a "google certified researcher".  Sorry.
Matthew