Federal · SAM.gov · Virginia

Fox Tail

Department of DefenseIssuing agency·Virginia·via the SAM.gov Get Opportunities API

110days left

Due Jan 29, 2027·Posted Sep 24, 2026

Prequalify For BondingBonding Prequal

AI takeaways

DARPA is soliciting innovative proposals for the Fox Tail program in the general area of extreme-scale hydrodynamics, with place of performance in VA.
The program is an 18-month effort with a 12-month Base period and a 6-month Option period, and proposals are due January 29, 2027.
The solicitation number is DARPA-PS-26-136 and the issuing agency is the Department of Defense.
Proposals must address classified metrics and include a cost proposal using the provided DARPA Cost Proposal Spreadsheet.
The procurement method is a Solicitation, and awards will be Other Transaction Agreements for Prototype.
Requirement: Proposers must have a current CMMC Level 2 (Self-Assessment) status posted in SPRS to be eligible for award.
Requirement: Proposers must submit a completed Representations and Certifications (Attachment J).
Requirement: Proposers must include a statement identifying which condition(s) under 10 U.S.C. § 4022(d)(1) are met for use of OTs for Prototypes.

Term: 18-month effort, with a…
Method: Solicitation
Documents: 7 files

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Contact the buyer

BAA Coordinator

foxtail@darpa.milEmail

Location:

VA 222032114

Open in Maps ↗

Notice

544aaeb3e0a148d1be7c36ca60d9e844

DARPA-PS-26-136

Method

Solicitation

Duration

18-month effort, with a 12-month Base period and a 6-month Option period

What this bid is asking for

AI-generated

Submit a classified technical proposal addressing the metrics in the classified addendum.
Submit an unclassified cost proposal (Volume II) using the DARPA Cost Proposal Spreadsheet (Attachment F).
Submit a proposed Schedule of Milestones and Payments (Attachment I) with milestones listed by number.
Submit a completed/redlined Model Other Transaction agreement (Attachment G) and Representations and Certifications (Attachment J).
Provide a statement identifying which condition(s) under 10 U.S.C. § 4022(d)(1) are met for use of OTs for Prototypes.

Posted Scope of Work

The Defense Advanced Research Projects Agency (DARPA) is soliciting innovative proposals in the general area of extreme-scale hydrodynamics, including, but not limited to, high amplitude wave propagation, very high Reynolds number flows, and abrupt phase changes. Proposed research should investigate innovative theoretical and computational modeling approaches relying on first principles-based closures of the governing laws of fluid motion under such conditions.

Scope, read from the documentsAI-generated

Proposed research should investigate innovative theoretical and computational modeling approaches relying on first principles-based closures of the governing laws of fluid motion under extreme-scale conditions. The program is classified at the SECRET level and includes a 12-month Base period and a 6-month Option period. Proposers must address specific metrics in a classified addendum and submit a cost proposal using the provided DARPA Cost Proposal Spreadsheet.

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Documents

Download zip

DARPA-PS-26-136.pdfPDF

Preview Download

Attachment_K_CLASSIFIED_ADDENDUM_AND_SECURITY_CLASS_GUIDE_REQUEST_FORM.docxDOCX

Preview Download

Attachment_J_Representations_and_Certifications.docxDOCX

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Attachment_I_Schedule_of_Milestones_and_Payments.xlsxXLSX

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Attachment_G_Model_Other_Transaction_for_Agreement.docxDOCX

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Attachment_F_DARPA_Cost_Proposal_Spreadsheet.xlsxXLSX

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Attachment_E_Proposal_Volume_II__Cost_Proposal_.docxDOCX

Preview Download

Questions & answers

AI-generated

What is the due date for proposals?

Proposal Due Date: January 29, 2027, at 4:00 p.m.

What is the period of performance?

Fox Tail is an 18-month effort, with a 12-month Base period and a 6-month Option period.

What type of award instrument will be used?

Types of instruments that may be awarded: Other Transaction Agreements for Prototype.

Who is the point of contact for this solicitation?

The PS Coordinator for this effort may be reached at: FoxTail@darpa.mil.

Full source recordEvery field SAM.gov published, untouched

Hit

544aaeb3e0a148d1be7c36ca60d9e844

Type

Code: o
Value: Solicitation

Type

opportunity

Award

Awardee

Title

Fox Tail

R Score

Is Active

Yes

Is Canceled

Publish Date

Sep 24, 2026

Descriptions

Content: The Defense Advanced Research Projects Agency (DARPA) is soliciting innovative proposals in the general area of extreme-scale hydrodynamics, including, but not limited to, high amplitude wave propagation, very high Reynolds number flows, and abrupt p
Last Modified Date: Sep 24, 2026

Modified Date

Sep 24, 2026

Response Date

Jan 29, 2027

Modifications

Count: 0

Response Time Zone

America/New_York

Response Date Actual

Jan 29, 2027

Solicitation Number

DARPA-PS-26-136

Organization Hierarchy

Code

9700

Name

DEPT OF DEFENSE

Type

DEPARTMENT

Level

Status

active

Address

Organization Id

100000000

Code

97AE

Name

DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA)

Type

AGENCY

Level

Status

active

Address

Organization Id

300000412

Code

HR0011

Name

DEF ADVANCED RESEARCH PROJECTS AGCY

Type

OFFICE

Level

Status

active

Address

Zip: "222032114"
City: "ARLINGTON"
State: "VA"
Country: "USA"
Street Address: "675 NORTH RANDOLPH STREET"

Organization Id

500035490

Org

Cgac

097

Code

HR0011

Name

DEF ADVANCED RESEARCH PROJECTS AGCY

Type

OFFICE

Level

L1 Name

DEPT OF DEFENSE

L2 Name

DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA)

L3 Name

DEF ADVANCED RESEARCH PROJECTS AGCY

Org Key

500035490

Aac Code

HR0011

Fpds Code

97AE

L1 Org Key

100000000

L2 Org Key

300000412

Created By

MIGRATOR_NEW_ATOM_FEED

Fpds Org Id

HR0011

Mod Status

ACTIVE

Parent Org

DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA)

Start Date

Oct 1, 2003

Created Date

May 2, 2004

L1 Short Name

DOD

Has Contracts

Yes

Is Source Fpds

Yes

Org Addresses

City: ARLINGTON
Type: M
State: VA
Org Key: 500035490
Zipcode: 222032114
Created By: MIGRATOR_NEW_ATOM_FEED
Mod Status: active
Address Key: 500668784
Country Code: USA
Created Date: May 2, 2004
Is Source Fpds: Yes
Street Address: 675 NORTH RANDOLPH STREET
Last Modified By: FPDSADMIN
Last Modified Date: Sep 17, 2013

Parent Org Key

300000412

Code Hierarchy

9700.97AE.HR0011

Org Legacy List

Source: LEGACY_OFFICES_FBO_DOD.xls
Org Key: 500035490
Legacy Id: 2597447818538ac164e1401b140bbb6e
Created By: nithin.john-emanuel@gsa.gov_oda
Legacy Key: 6731
Legacy Name: Contracts Management Office
Created Date: Oct 16, 2019
Last Modified By: nithin.john-emanuel@gsa.gov_oda
Last Modified Date: Oct 16, 2019
Legacy System Name: FBO

Full Parent Path

100000000.300000412.500035490

Last Modified By

FPDSADMIN_NEW_ATOM_FEED

Org Office Types

Org Key: 500035490
Position: 3
Is Latest: Yes
Office Id: 2135377
Created By: FH-RE-INGESTION
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 1
Created Date: Jul 13, 2020
Office Type Id: 1
Last Modified By: FH-RE-INGESTION
Office Type Name: CONTRACT FUNDING
Last Modified Date: Jul 13, 2020

Org Key: 500035490
Position: 4
Is Latest: Yes
Office Id: 2135378
Created By: FH-RE-INGESTION
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 5
Created Date: Jul 13, 2020
Office Type Id: 5
Last Modified By: FH-RE-INGESTION
Office Type Name: FINANCIAL ASSISTANCE FUNDING
Last Modified Date: Jul 13, 2020

Org Key: 500035490
Position: 1
Is Latest: Yes
Office Id: 2135379
Created By: FH-RE-INGESTION
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 2
Created Date: Jul 13, 2020
Office Type Id: 2
Last Modified By: FH-RE-INGESTION
Office Type Name: CONTRACT AWARDS
Last Modified Date: Jul 13, 2020

Org Key: 500035490
Position: 2
Is Latest: Yes
Office Id: 2135376
Created By: FH_Job
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 3
Created Date: Sep 30, 2018
Office Type Id: 3
Last Modified By: IAE_29337_DOD
Office Type Name: FINANCIAL ASSISTANCE AWARDS
Last Modified Date: Jan 8, 2020

Last Modified Date

Sep 17, 2013

Full Parent Path Name

DEPT OF DEFENSE.DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA).DEF ADVANCED RESEARCH PROJECTS AGCY

Type

Solicitation

Title

Fox Tail

Active

Yes

Detail

Type

Naics

Code: 541715
Type: primary

Title

Fox Tail

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$0, forever48-hr responseA-ratedSoft pull

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Source: SAM.gov (notice 544aaeb3e0a148d1be7c36ca60d9e844), retrieved via the SAM.gov Get Opportunities API. View the official posting, and always confirm requirements and deadlines with the issuing agency.

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Federal · SAM.gov · Virginia

Fox Tail

Department of DefenseIssuing agency·Virginia·via the SAM.gov Get Opportunities API

110days left

Due Jan 29, 2027·Posted Sep 24, 2026

Prequalify For BondingBonding Prequal

AI takeaways

DARPA is soliciting innovative proposals for the Fox Tail program in the general area of extreme-scale hydrodynamics, with place of performance in VA.
The program is an 18-month effort with a 12-month Base period and a 6-month Option period, and proposals are due January 29, 2027.
The solicitation number is DARPA-PS-26-136 and the issuing agency is the Department of Defense.
Proposals must address classified metrics and include a cost proposal using the provided DARPA Cost Proposal Spreadsheet.
The procurement method is a Solicitation, and awards will be Other Transaction Agreements for Prototype.
Requirement: Proposers must have a current CMMC Level 2 (Self-Assessment) status posted in SPRS to be eligible for award.
Requirement: Proposers must submit a completed Representations and Certifications (Attachment J).
Requirement: Proposers must include a statement identifying which condition(s) under 10 U.S.C. § 4022(d)(1) are met for use of OTs for Prototypes.

Term: 18-month effort, with a…
Method: Solicitation
Documents: 7 files

These takeaways are AI-generated and may be incomplete or wrong. Always verify every detail against the official documents before you bid.

Want to know if you can be bonded for this project? Get prequalified.One free application, soft pull — sized to your work.

Know you can be bonded before you spend a week on the bid
No scramble for a bond at the deadline — it becomes a request form
A good guy letter to show an agency

Prequalify For Bonding →

Contact the buyer

BAA Coordinator

foxtail@darpa.milEmail

Location:

VA 222032114

Open in Maps ↗

Notice

544aaeb3e0a148d1be7c36ca60d9e844

DARPA-PS-26-136

Method

Solicitation

Duration

18-month effort, with a 12-month Base period and a 6-month Option period

What this bid is asking for

AI-generated

Submit a classified technical proposal addressing the metrics in the classified addendum.
Submit an unclassified cost proposal (Volume II) using the DARPA Cost Proposal Spreadsheet (Attachment F).
Submit a proposed Schedule of Milestones and Payments (Attachment I) with milestones listed by number.
Submit a completed/redlined Model Other Transaction agreement (Attachment G) and Representations and Certifications (Attachment J).
Provide a statement identifying which condition(s) under 10 U.S.C. § 4022(d)(1) are met for use of OTs for Prototypes.

Posted Scope of Work

Scope, read from the documentsAI-generated

More science & technology research bids in Virginia, weekly.

We post new science & technology research opportunities in Virginia as agencies publish them. Get them in one email — free, and unsubscribe whenever.

Documents

Download zip

DARPA-PS-26-136.pdfPDF

Preview Download

Attachment_K_CLASSIFIED_ADDENDUM_AND_SECURITY_CLASS_GUIDE_REQUEST_FORM.docxDOCX

Preview Download

Attachment_J_Representations_and_Certifications.docxDOCX

Preview Download

Attachment_I_Schedule_of_Milestones_and_Payments.xlsxXLSX

Preview Download

Attachment_G_Model_Other_Transaction_for_Agreement.docxDOCX

Preview Download

Attachment_F_DARPA_Cost_Proposal_Spreadsheet.xlsxXLSX

Preview Download

Attachment_E_Proposal_Volume_II__Cost_Proposal_.docxDOCX

Preview Download

Questions & answers

AI-generated

What is the due date for proposals?

Proposal Due Date: January 29, 2027, at 4:00 p.m.

What is the period of performance?

Fox Tail is an 18-month effort, with a 12-month Base period and a 6-month Option period.

What type of award instrument will be used?

Types of instruments that may be awarded: Other Transaction Agreements for Prototype.

Who is the point of contact for this solicitation?

The PS Coordinator for this effort may be reached at: FoxTail@darpa.mil.

Full source recordEvery field SAM.gov published, untouched

Hit

544aaeb3e0a148d1be7c36ca60d9e844

Type

Code: o
Value: Solicitation

Type

opportunity

Award

Awardee

Title

Fox Tail

R Score

Is Active

Yes

Is Canceled

Publish Date

Sep 24, 2026

Descriptions

Content: The Defense Advanced Research Projects Agency (DARPA) is soliciting innovative proposals in the general area of extreme-scale hydrodynamics, including, but not limited to, high amplitude wave propagation, very high Reynolds number flows, and abrupt p
Last Modified Date: Sep 24, 2026

Modified Date

Sep 24, 2026

Response Date

Jan 29, 2027

Modifications

Count: 0

Response Time Zone

America/New_York

Response Date Actual

Jan 29, 2027

Solicitation Number

DARPA-PS-26-136

Organization Hierarchy

Code

9700

Name

DEPT OF DEFENSE

Type

DEPARTMENT

Level

Status

active

Address

Organization Id

100000000

Code

97AE

Name

DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA)

Type

AGENCY

Level

Status

active

Address

Organization Id

300000412

Code

HR0011

Name

DEF ADVANCED RESEARCH PROJECTS AGCY

Type

OFFICE

Level

Status

active

Address

Zip: "222032114"
City: "ARLINGTON"
State: "VA"
Country: "USA"
Street Address: "675 NORTH RANDOLPH STREET"

Organization Id

500035490

Org

Cgac

097

Code

HR0011

Name

DEF ADVANCED RESEARCH PROJECTS AGCY

Type

OFFICE

Level

L1 Name

DEPT OF DEFENSE

L2 Name

DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA)

L3 Name

DEF ADVANCED RESEARCH PROJECTS AGCY

Org Key

500035490

Aac Code

HR0011

Fpds Code

97AE

L1 Org Key

100000000

L2 Org Key

300000412

Created By

MIGRATOR_NEW_ATOM_FEED

Fpds Org Id

HR0011

Mod Status

ACTIVE

Parent Org

DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA)

Start Date

Oct 1, 2003

Created Date

May 2, 2004

L1 Short Name

DOD

Has Contracts

Yes

Is Source Fpds

Yes

Org Addresses

City: ARLINGTON
Type: M
State: VA
Org Key: 500035490
Zipcode: 222032114
Created By: MIGRATOR_NEW_ATOM_FEED
Mod Status: active
Address Key: 500668784
Country Code: USA
Created Date: May 2, 2004
Is Source Fpds: Yes
Street Address: 675 NORTH RANDOLPH STREET
Last Modified By: FPDSADMIN
Last Modified Date: Sep 17, 2013

Parent Org Key

300000412

Code Hierarchy

9700.97AE.HR0011

Org Legacy List

Source: LEGACY_OFFICES_FBO_DOD.xls
Org Key: 500035490
Legacy Id: 2597447818538ac164e1401b140bbb6e
Created By: nithin.john-emanuel@gsa.gov_oda
Legacy Key: 6731
Legacy Name: Contracts Management Office
Created Date: Oct 16, 2019
Last Modified By: nithin.john-emanuel@gsa.gov_oda
Last Modified Date: Oct 16, 2019
Legacy System Name: FBO

Full Parent Path

100000000.300000412.500035490

Last Modified By

FPDSADMIN_NEW_ATOM_FEED

Org Office Types

Org Key: 500035490
Position: 3
Is Latest: Yes
Office Id: 2135377
Created By: FH-RE-INGESTION
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 1
Created Date: Jul 13, 2020
Office Type Id: 1
Last Modified By: FH-RE-INGESTION
Office Type Name: CONTRACT FUNDING
Last Modified Date: Jul 13, 2020

Org Key: 500035490
Position: 4
Is Latest: Yes
Office Id: 2135378
Created By: FH-RE-INGESTION
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 5
Created Date: Jul 13, 2020
Office Type Id: 5
Last Modified By: FH-RE-INGESTION
Office Type Name: FINANCIAL ASSISTANCE FUNDING
Last Modified Date: Jul 13, 2020

Org Key: 500035490
Position: 1
Is Latest: Yes
Office Id: 2135379
Created By: FH-RE-INGESTION
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 2
Created Date: Jul 13, 2020
Office Type Id: 2
Last Modified By: FH-RE-INGESTION
Office Type Name: CONTRACT AWARDS
Last Modified Date: Jul 13, 2020

Org Key: 500035490
Position: 2
Is Latest: Yes
Office Id: 2135376
Created By: FH_Job
Mod Status: Yes
Start Date: Oct 1, 2003
Office Type: 3
Created Date: Sep 30, 2018
Office Type Id: 3
Last Modified By: IAE_29337_DOD
Office Type Name: FINANCIAL ASSISTANCE AWARDS
Last Modified Date: Jan 8, 2020

Last Modified Date

Sep 17, 2013

Full Parent Path Name

DEPT OF DEFENSE.DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA).DEF ADVANCED RESEARCH PROJECTS AGCY

Type

Solicitation

Title

Fox Tail

Active

Yes

Detail

Type

Naics

Code: 541715
Type: primary

Title

Fox Tail

Need a bond for this one? Get prequalified once.

Most Virginia work asks for the two below, and the solicitation documents are where it’s stated. One prequalification covers both — on this bid and the next.

Bid BondUsually 5–10% of your bid

Due with your bid

FreeGet this one →

Performance & Payment BondUsually 100% of the contract

Due after award

Flat 3%Get this one →

$0, forever48-hr responseA-ratedSoft pull

What’s a good guy letter?

A surety’s written statement that it expects to bond you up to a stated amount, subject to final underwriting. It’s what an agency asks to see before they take your bid seriously.

Bonding Directory Get a free bid bond

Not the right RFP for you?

Open opportunities in the same trade and area, with time left to bid

See all Science & Technology Research bids →

Not finding it?Describe the work in your own words and we’ll search the whole site.Search with AI →

Prequalify For Bondingknow you’re bondable · no bond scramble Bid bond

Fox Tail

What this bid is asking for

Posted Scope of Work

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Documents

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Questions & answers

Need a bond for this one? Get prequalified once.

Not the right RFP for you?

Fox Tail

What this bid is asking for

Posted Scope of Work

More science & technology research bids in Virginia, weekly.

Documents

Sign up for a Light RFP account to download documents

Questions & answers

Need a bond for this one? Get prequalified once.

Not the right RFP for you?