| Item | Obligations |
|---|---|
| Engineering Services | $307M |
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $1.3M |
| Commercial and Institutional Building Construction | $395K |
| Power and Communication Line and Related Structures Construction | $278K |
Engineering Services is Ameresco's largest federal market, with $307M in obligations.