Si Engineering, P.C.: New York City Government Payments
as recorded by New York City: SI ENGINEERING, P.C.
Si Engineering, P.C. is the 850th-largest recipient of New York City government payments tracked by SpendLedger, and ranks 5th in N/A spending. Its payments amount to 0.1% of everything the Department of Environmental Protection has paid vendors in that span. Payments to it fell 28.2% year over year.
Primary spending category: N/A
$70,267,686total received
3,321payments
6agencies
Sep 27, 2012 – Jun 30, 2025first / last payment
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Payments by fiscal year
Payments by fiscal year and agency
What the payments were for
Spending categories exactly as New York City government codes them in its own accounting; we do not reclassify.
| Category | Payments | Total | First / last |
|---|---|---|---|
| CONTRACTUAL SERVICES GENERAL | 1 | $9,999 | Oct 7, 2024 – Oct 7, 2024 |
| OTHR SERV AND CHRGS-GENERAL | 2 | $85,361 | Oct 7, 2024 – May 6, 2025 |
| PROMPT PAYMENT INTEREST | 1 | $50 | Jan 25, 2016 – Jan 25, 2016 |
| N/A | 1,934 | $41,736,121 | Nov 30, 2015 – Jun 27, 2025 |
| DESIGN-CONSULTANT-IOTB | 396 | $13,871,604 | Sep 27, 2012 – Jun 9, 2025 |
| IOTB CONSTRUCTION | 286 | $13,280,156 | Jul 25, 2016 – Jun 30, 2025 |
| CONSTRUCTION-BUILDINGS | 701 | $1,284,394 | May 29, 2024 – Jun 24, 2025 |
Largest payments by fiscal year
The biggest individual payments in each fiscal year, up to 20 per year. Where the source publishes a purchase order behind a payment, the PO description appears; older payments may carry a bare PO reference because the government's published PO files do not reach back that far.
Download this table as CSV (free, with source citation on every row)
FY 2025top 20 of 994 payments$7,249,489
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| Dec 30, 2024 | Department of Transportation | $268,380.68 | IOTB CONSTRUCTION | – |
| Jul 29, 2024 | Department of Transportation | $245,689.40 | IOTB CONSTRUCTION | – |
| Apr 28, 2025 | Department of Transportation | $239,027.40 | IOTB CONSTRUCTION | – |
| Aug 5, 2024 | Department of Environmental Protection | $125,872.90 | IOTB CONSTRUCTION | – |
| Jul 10, 2024 | Department of Environmental Protection | $125,414.40 | IOTB CONSTRUCTION | – |
| Aug 27, 2024 | Department of Environmental Protection | $125,264.33 | IOTB CONSTRUCTION | – |
| Sep 30, 2024 | Department of Environmental Protection | $121,938.00 | IOTB CONSTRUCTION | – |
| Jan 21, 2025 | Department of Transportation | $104,857.00 | IOTB CONSTRUCTION | – |
| Mar 3, 2025 | Department of Transportation | $101,126.40 | IOTB CONSTRUCTION | – |
| Sep 23, 2024 | Department of Transportation | $95,989.12 | IOTB CONSTRUCTION | – |
| Sep 3, 2024 | Department of Transportation | $94,267.33 | IOTB CONSTRUCTION | – |
| Aug 26, 2024 | Department of Transportation | $92,020.00 | IOTB CONSTRUCTION | – |
| Jun 30, 2025 | Department of Transportation | $91,606.02 | IOTB CONSTRUCTION | – |
| Jul 29, 2024 | Department of Transportation | $89,622.72 | IOTB CONSTRUCTION | – |
| Oct 28, 2024 | Department of Transportation | $89,437.40 | IOTB CONSTRUCTION | – |
| Nov 19, 2024 | Department of Transportation | $88,624.32 | IOTB CONSTRUCTION | – |
| Jan 28, 2025 | Department of Transportation | $87,832.40 | IOTB CONSTRUCTION | – |
| Jan 21, 2025 | Department of Transportation | $86,477.75 | IOTB CONSTRUCTION | – |
| Aug 6, 2024 | Department of Transportation | $82,700.64 | IOTB CONSTRUCTION | – |
| Mar 26, 2025 | Department of Transportation | $82,291.76 | IOTB CONSTRUCTION | – |
FY 2024top 20 of 450 payments$10,098,435
FY 2023top 20 of 353 payments$8,822,196
FY 2022top 20 of 302 payments$7,521,592
FY 2021top 20 of 364 payments$8,257,508
FY 2020top 20 of 176 payments$4,619,296
FY 2019top 20 of 116 payments$4,623,659
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| Apr 11, 2019 | Department of Transportation | $221,324.42 | IOTB CONSTRUCTION | – |
| Aug 27, 2018 | Department of Environmental Protection | $218,194.58 | IOTB CONSTRUCTION | – |
| Mar 11, 2019 | Department of Environmental Protection | $148,870.74 | IOTB CONSTRUCTION | – |
| Oct 1, 2018 | Department of Environmental Protection | $139,292.54 | IOTB CONSTRUCTION | – |
| Mar 14, 2019 | Department of Design and Construction | $125,140.78 | N/A | – |
| Mar 14, 2019 | Department of Design and Construction | $125,140.78 | N/A | – |
| Oct 15, 2018 | Department of Environmental Protection | $120,651.15 | IOTB CONSTRUCTION | – |
| Apr 24, 2019 | Department of Environmental Protection | $113,474.32 | IOTB CONSTRUCTION | – |
| Apr 1, 2019 | Department of Environmental Protection | $96,082.50 | IOTB CONSTRUCTION | – |
| Apr 4, 2019 | Department of Design and Construction | $92,868.82 | N/A | – |
| Apr 4, 2019 | Department of Design and Construction | $92,868.82 | N/A | – |
| Dec 14, 2018 | Department of Environmental Protection | $91,230.35 | IOTB CONSTRUCTION | – |
| Mar 27, 2019 | Department of Transportation | $89,272.20 | IOTB CONSTRUCTION | – |
| Nov 9, 2018 | Department of Environmental Protection | $89,026.88 | IOTB CONSTRUCTION | – |
| Dec 10, 2018 | Department of Environmental Protection | $87,004.47 | IOTB CONSTRUCTION | – |
| May 20, 2019 | Department of Environmental Protection | $83,886.75 | IOTB CONSTRUCTION | – |
| Jan 14, 2019 | Department of Environmental Protection | $81,641.56 | IOTB CONSTRUCTION | – |
| Feb 5, 2019 | Department of Environmental Protection | $79,563.90 | IOTB CONSTRUCTION | – |
| Jan 25, 2019 | Department of Design and Construction | $75,275.80 | N/A | – |
| Jan 25, 2019 | Department of Design and Construction | $75,275.80 | N/A | – |
FY 2018top 20 of 144 payments$3,957,602
FY 2017top 20 of 91 payments$3,553,104
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| Jun 28, 2017 | Department of Transportation | $179,107.90 | IOTB CONSTRUCTION | – |
| Aug 8, 2016 | Department of Design and Construction | $152,130.80 | N/A | – |
| Aug 8, 2016 | Department of Design and Construction | $152,130.80 | N/A | – |
| Jul 25, 2016 | Department of Environmental Protection | $145,985.47 | IOTB CONSTRUCTION | – |
| Aug 12, 2016 | Department of Parks and Recreation | $121,441.15 | IOTB CONSTRUCTION | – |
| Jun 26, 2017 | Department of Environmental Protection | $88,209.70 | DESIGN-CONSULTANT-IOTB | – |
| May 10, 2017 | Department of Environmental Protection | $79,017.65 | DESIGN-CONSULTANT-IOTB | – |
| Aug 8, 2016 | Department of Design and Construction | $78,186.65 | N/A | – |
| Aug 8, 2016 | Department of Design and Construction | $78,186.65 | N/A | – |
| Mar 23, 2017 | Department of Environmental Protection | $71,597.20 | DESIGN-CONSULTANT-IOTB | – |
| Dec 14, 2016 | Department of Environmental Protection | $70,380.00 | DESIGN-CONSULTANT-IOTB | – |
| Jan 30, 2017 | Department of Environmental Protection | $69,092.00 | DESIGN-CONSULTANT-IOTB | – |
| Oct 6, 2016 | Department of Environmental Protection | $67,590.41 | DESIGN-CONSULTANT-IOTB | – |
| Nov 21, 2016 | Department of Environmental Protection | $67,472.80 | DESIGN-CONSULTANT-IOTB | – |
| Sep 19, 2016 | Department of Transportation | $64,910.72 | IOTB CONSTRUCTION | – |
| Apr 17, 2017 | Department of Environmental Protection | $64,836.90 | DESIGN-CONSULTANT-IOTB | – |
| Jan 13, 2017 | Department of Environmental Protection | $63,020.00 | DESIGN-CONSULTANT-IOTB | – |
| Jun 8, 2017 | Department of Transportation | $60,446.00 | IOTB CONSTRUCTION | – |
| Feb 17, 2017 | Department of Environmental Protection | $57,426.40 | DESIGN-CONSULTANT-IOTB | – |
| Oct 13, 2016 | Department of Design and Construction | $57,333.65 | N/A | – |
FY 2016top 20 of 157 payments$4,958,836
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| May 4, 2016 | Department of Transportation | $401,682.64 | DESIGN-CONSULTANT-IOTB | – |
| Jan 6, 2016 | Department of Transportation | $236,751.44 | DESIGN-CONSULTANT-IOTB | – |
| Jul 31, 2015 | Department of Transportation | $178,150.39 | DESIGN-CONSULTANT-IOTB | – |
| Jul 1, 2015 | Department of Transportation | $166,231.85 | DESIGN-CONSULTANT-IOTB | – |
| Jul 31, 2015 | Department of Transportation | $161,600.35 | DESIGN-CONSULTANT-IOTB | – |
| May 13, 2016 | Department of Transportation | $144,071.02 | DESIGN-CONSULTANT-IOTB | – |
| Jan 11, 2016 | Department of Transportation | $113,335.17 | DESIGN-CONSULTANT-IOTB | – |
| Apr 6, 2016 | Department of Transportation | $92,244.50 | DESIGN-CONSULTANT-IOTB | – |
| Jul 1, 2015 | Department of Environmental Protection | $76,120.73 | DESIGN-CONSULTANT-IOTB | – |
| Dec 14, 2015 | Department of Transportation | $62,302.40 | DESIGN-CONSULTANT-IOTB | – |
| Sep 8, 2015 | Department of Environmental Protection | $61,479.14 | DESIGN-CONSULTANT-IOTB | – |
| Apr 28, 2016 | Department of Transportation | $58,101.50 | DESIGN-CONSULTANT-IOTB | – |
| Oct 5, 2015 | Department of Environmental Protection | $57,844.70 | DESIGN-CONSULTANT-IOTB | – |
| Nov 23, 2015 | Department of Environmental Protection | $56,445.76 | DESIGN-CONSULTANT-IOTB | – |
| Jun 13, 2016 | Department of Environmental Protection | $55,402.40 | DESIGN-CONSULTANT-IOTB | – |
| May 31, 2016 | Department of Transportation | $55,168.75 | DESIGN-CONSULTANT-IOTB | – |
| Apr 11, 2016 | Department of Transportation | $54,969.61 | DESIGN-CONSULTANT-IOTB | – |
| Jul 20, 2015 | Department of Environmental Protection | $54,323.62 | DESIGN-CONSULTANT-IOTB | – |
| Aug 17, 2015 | Department of Environmental Protection | $54,210.80 | DESIGN-CONSULTANT-IOTB | – |
| Dec 4, 2015 | Department of Transportation | $53,065.75 | DESIGN-CONSULTANT-IOTB | – |
FY 2015top 20 of 101 payments$3,877,471
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| Mar 27, 2015 | Department of Transportation | $154,000.00 | DESIGN-CONSULTANT-IOTB | – |
| Feb 2, 2015 | Department of Environmental Protection | $132,243.76 | DESIGN-CONSULTANT-IOTB | – |
| Mar 19, 2015 | Department of Environmental Protection | $96,641.72 | DESIGN-CONSULTANT-IOTB | – |
| Aug 15, 2014 | Department of Transportation | $94,410.00 | DESIGN-CONSULTANT-IOTB | – |
| Dec 15, 2014 | Department of Transportation | $88,021.96 | DESIGN-CONSULTANT-IOTB | – |
| Aug 14, 2014 | Department of Transportation | $83,259.40 | DESIGN-CONSULTANT-IOTB | – |
| Aug 25, 2014 | Department of Transportation | $81,340.00 | DESIGN-CONSULTANT-IOTB | – |
| Aug 1, 2014 | Department of Transportation | $75,230.69 | DESIGN-CONSULTANT-IOTB | – |
| Jan 9, 2015 | Department of Transportation | $73,637.02 | DESIGN-CONSULTANT-IOTB | – |
| Apr 20, 2015 | Department of Transportation | $72,800.00 | DESIGN-CONSULTANT-IOTB | – |
| Nov 3, 2014 | Department of Transportation | $69,557.50 | DESIGN-CONSULTANT-IOTB | – |
| Mar 2, 2015 | Department of Transportation | $67,507.80 | DESIGN-CONSULTANT-IOTB | – |
| Feb 2, 2015 | Department of Transportation | $66,303.60 | DESIGN-CONSULTANT-IOTB | – |
| Mar 30, 2015 | Department of Environmental Protection | $65,636.30 | DESIGN-CONSULTANT-IOTB | – |
| Jun 17, 2015 | Department of Environmental Protection | $65,094.20 | DESIGN-CONSULTANT-IOTB | – |
| Oct 8, 2014 | Department of Transportation | $65,037.20 | DESIGN-CONSULTANT-IOTB | – |
| Dec 3, 2014 | Department of Transportation | $64,119.58 | DESIGN-CONSULTANT-IOTB | – |
| Dec 22, 2014 | Department of Transportation | $59,674.00 | DESIGN-CONSULTANT-IOTB | – |
| May 14, 2015 | Department of Environmental Protection | $59,645.98 | DESIGN-CONSULTANT-IOTB | – |
| Mar 5, 2015 | Department of Transportation | $58,883.00 | DESIGN-CONSULTANT-IOTB | – |
FY 2014top 20 of 51 payments$1,810,780
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| Dec 30, 2013 | Department of Transportation | $179,309.89 | DESIGN-CONSULTANT-IOTB | – |
| Jul 24, 2013 | Department of Environmental Protection | $102,494.62 | DESIGN-CONSULTANT-IOTB | – |
| Oct 23, 2013 | Department of Environmental Protection | $77,543.42 | DESIGN-CONSULTANT-IOTB | – |
| Nov 20, 2013 | Department of Environmental Protection | $66,447.39 | DESIGN-CONSULTANT-IOTB | – |
| Sep 3, 2013 | Department of Environmental Protection | $65,692.55 | DESIGN-CONSULTANT-IOTB | – |
| Feb 18, 2014 | Department of Environmental Protection | $61,634.00 | DESIGN-CONSULTANT-IOTB | – |
| Feb 10, 2014 | Department of Transportation | $55,288.64 | DESIGN-CONSULTANT-IOTB | – |
| May 9, 2014 | Department of Transportation | $54,775.88 | DESIGN-CONSULTANT-IOTB | – |
| May 23, 2014 | Department of Transportation | $54,174.91 | DESIGN-CONSULTANT-IOTB | – |
| Dec 16, 2013 | Department of Environmental Protection | $53,218.48 | DESIGN-CONSULTANT-IOTB | – |
| Nov 6, 2013 | Department of Environmental Protection | $50,612.70 | DESIGN-CONSULTANT-IOTB | – |
| Feb 21, 2014 | Department of Transportation | $48,732.79 | DESIGN-CONSULTANT-IOTB | – |
| May 12, 2014 | Department of Transportation | $48,366.75 | DESIGN-CONSULTANT-IOTB | – |
| Apr 18, 2014 | Department of Transportation | $45,670.08 | DESIGN-CONSULTANT-IOTB | – |
| Jun 16, 2014 | Department of Transportation | $44,298.90 | DESIGN-CONSULTANT-IOTB | – |
| Feb 18, 2014 | Department of Transportation | $42,256.00 | DESIGN-CONSULTANT-IOTB | – |
| Jan 2, 2014 | Department of Environmental Protection | $40,421.20 | DESIGN-CONSULTANT-IOTB | – |
| Sep 23, 2013 | Department of Environmental Protection | $40,068.00 | DESIGN-CONSULTANT-IOTB | – |
| Mar 5, 2014 | Department of Transportation | $38,282.14 | DESIGN-CONSULTANT-IOTB | – |
| Sep 19, 2013 | Department of Environmental Protection | $37,748.36 | DESIGN-CONSULTANT-IOTB | – |
FY 2013top 20 of 22 payments$917,715
| Date | Agency | Amount | Category | Purchase order |
|---|---|---|---|---|
| Mar 18, 2013 | Department of Environmental Protection | $98,479.50 | DESIGN-CONSULTANT-IOTB | – |
| May 17, 2013 | Department of Environmental Protection | $73,853.23 | DESIGN-CONSULTANT-IOTB | – |
| Jun 17, 2013 | Department of Environmental Protection | $71,634.00 | DESIGN-CONSULTANT-IOTB | – |
| Sep 27, 2012 | Department of Transportation | $64,540.32 | DESIGN-CONSULTANT-IOTB | – |
| Oct 19, 2012 | Department of Transportation | $51,642.92 | DESIGN-CONSULTANT-IOTB | – |
| Apr 17, 2013 | Department of Environmental Protection | $51,095.38 | DESIGN-CONSULTANT-IOTB | – |
| Nov 15, 2012 | Department of Transportation | $49,576.14 | DESIGN-CONSULTANT-IOTB | – |
| Feb 25, 2013 | Department of Environmental Protection | $48,100.71 | DESIGN-CONSULTANT-IOTB | – |
| Apr 17, 2013 | Department of Environmental Protection | $42,403.25 | DESIGN-CONSULTANT-IOTB | – |
| May 23, 2013 | Department of Transportation | $41,708.18 | DESIGN-CONSULTANT-IOTB | – |
| Jun 17, 2013 | Department of Transportation | $41,028.62 | DESIGN-CONSULTANT-IOTB | – |
| Mar 18, 2013 | Department of Transportation | $36,630.08 | DESIGN-CONSULTANT-IOTB | – |
| Jan 22, 2013 | Department of Transportation | $36,524.96 | DESIGN-CONSULTANT-IOTB | – |
| Feb 19, 2013 | Department of Transportation | $36,286.56 | DESIGN-CONSULTANT-IOTB | – |
| Dec 13, 2012 | Department of Transportation | $36,008.00 | DESIGN-CONSULTANT-IOTB | – |
| Apr 17, 2013 | Department of Transportation | $35,111.36 | DESIGN-CONSULTANT-IOTB | – |
| May 13, 2013 | Department of Environmental Protection | $27,843.20 | DESIGN-CONSULTANT-IOTB | – |
| Jun 19, 2013 | Department of Environmental Protection | $24,281.44 | DESIGN-CONSULTANT-IOTB | – |
| Mar 18, 2013 | Department of Environmental Protection | $23,214.72 | DESIGN-CONSULTANT-IOTB | – |
| Jan 30, 2013 | Department of Environmental Protection | $18,103.73 | DESIGN-CONSULTANT-IOTB | – |
Recent payments
| Date | Agency | Amount | Category | Method |
|---|---|---|---|---|
| Jun 30, 2025 | Department of Transportation | $91,606.02 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 30, 2025 | Department of Transportation | $10,305.68 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 30, 2025 | Department of Transportation | $30,720.92 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 30, 2025 | Department of Transportation | $69,059.30 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 30, 2025 | Department of Transportation | $3,435.23 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 30, 2025 | Department of Transportation | $9,160.60 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 30, 2025 | Department of Transportation | $200.78 | IOTB CONSTRUCTION | Capital Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $14,111.08 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $14,111.08 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $11,813.38 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $18,401.90 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $2,312.28 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $10,790.65 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $10,790.65 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $2,312.28 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $2,312.28 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $11,813.38 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $17,081.83 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $11,813.38 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $18,401.90 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $11,813.38 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $2,312.28 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $2,312.28 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $2,312.28 | N/A | Contracts |
| Jun 27, 2025 | Department of Environmental Protection | $12,440.03 | N/A | Contracts |
Other vendors serving Department of Environmental Protection
- Slattery Skanska/Gottlieb Skanska/Tully Const. JV $780,656,292
- New York City Economic Development Corporation $727,117,935
- Cac Industries Inc $720,373,938
- Sew Construction - JV $687,835,200
- WDF Inc $617,437,825
- Maspeth Supply Co LLC $515,469,345
- Jett Industries Inc $475,916,558
- John Picone Inc $459,591,951
- Hazen & Sawyer $455,192,970
- New York Power Authority $434,611,466
VerifiedData refreshed Sep 7, 2026 from Checkbook NYC (checkbooknyc.com): 38,060,921 payments on record, Dec 22, 2009 to Jun 30, 2025. How we verify this data