| Award | B085-124M Metropolitan Recreation Center Dehumidification System Recon. | Parks and Recreation | Sienia Construction Inc | $944K | Competitive Sealed Bids | Apr 28, 2026 | 84626B0016001 |
| Award | B073-415MA Prospect Park Garage Compound Maintenance Building Construction, Brooklyn | Parks and Recreation | Sienia Construction Inc | $7.8M | Competitive Sealed Bids/Pre-Qualified List | Apr 10, 2026 | 84625B0118001 |
| Award | BG-718MA: Marlboro Playground and Cadman Plaza Park Comfort Station Reconstruction, Brooklyn | Parks and Recreation | Sienia Construction Inc. | $3.5M | Competitive Sealed Bids | Sep 11, 2025 | 84623B0099001 |
| Award | M208D-119M: Construction of a Comfort Station in Harlem River Park, Manh | Parks and Recreation | Sienia Construction Inc. | $4.6M | Competitive Sealed Bids | May 16, 2024 | 84621B0038001 |
| Award | X092-119M-RECONSTRUCTION OF A COMFORT STATION IN WOODLAWN PLAYGROUND, BOROUGH OF THE BRONX | Parks and Recreation | Sienia Construction Inc. | $1.5M | Competitive Sealed Bids | Mar 18, 2024 | 84621B0152001 |
| Award | R028-120M-Tappen Park Village Hall Roof Reconstruction | Parks and Recreation | Sienia Construction Inc. | $3.4M | Competitive Sealed Bids | Jul 18, 2023 | 84621B0065001 |
| Award | M199-119M Construction of Comfort Station in Monsignor Kett | Parks and Recreation | Sienia Construction Inc. | $3.9M | Competitive Sealed Bids | Jun 16, 2023 | 84621B0007001 |
| Award | B087-115MA1: RECONSTRUCTION OF THE BATHHOUSE In Sunset Park | Parks and Recreation | Sienia Construction Inc. | $5.8M | Competitive Sealed Bids | Apr 26, 2023 | 84622B0036001 |
| Award | R105-119MA-Prall Playground Comfort Station Reconstruction | Parks and Recreation | Sienia Construction Inc. | $1.2M | Competitive Sealed Bids | Feb 14, 2023 | 84622B0001001 |
| Award | Reconstruction of the Lefferts House Located Along Flatbush Avenue Between The Zoo and The Willink Entrance in Prospect Park, BROOKLYN | Parks and Recreation | Sienia Construction Inc. | $2.3M | Competitive Sealed Bids | Aug 31, 2022 | B073-317M |
| Award | Wyckoff House Park Comfort Station Construction | Parks and Recreation | Sienia Construction Inc. | $4.9M | Competitive Sealed Bids | Dec 16, 2021 | b376-118m |
| Award | Prospect Park Lefferts House Reconstruction | Parks and Recreation | Sienia Construction Inc. | $2.3M | Competitive Sealed Bids | Nov 26, 2021 | B073-317M |
| Award | RECONSTRUCTION OF ENTRANCE LOBBY | Parks and Recreation | Sienia Construction Inc. | $883K | Competitive Sealed Bids | Jun 25, 2020 | 84619B0142001 |
| Award | RECONSTRUCTION OF A COMFORT STATION | Parks and Recreation | Sienia Construction Inc. | $2.3M | Competitive Sealed Bids | May 1, 2020 | 84619B0075001 |
| Award | RECONSTRUCTION OF COMFORT STATION IN NEWPORT PLAYGROUND | Parks and Recreation | Sienia Construction Inc. | $882K | Competitive Sealed Bids | Aug 1, 2019 | 84617B0182001 |
| Award | RECONSTRUCTION OF A COMFORT STATION | Parks and Recreation | Sienia Construction Inc. | $681K | Competitive Sealed Bids | Jul 31, 2019 | 84617B0176001 |