Carly Diffenderfer

Agency: Office of Procurement Operations Department of Homeland Security
Email: carly.diffenderfer@fps.dhs.gov
Phone: (267) 887-5709
Latest SAM.gov record: Mar 24, 2026

Contact facts

SAM.gov notices: 8
Contract awards and IDVs: 37 31 awards, 6 IDVs, as contracting staff
Top vendors: Diversified Protection Corp 15 awards and IDVs · $27.5M in award value

Michael Stapleton Associates, LTD. 7 awards and IDVs · $795K in award value
First SAM.gov record: Oct 30, 2024

Notices come from SAM.gov and awards from FPDS, which names the staff who created, approved or last changed an award without saying which.

SAM.gov notices

Notice	Posted
Explosive Detection Canine Team (EDCT) Services in Manhattan, New York Limited / Sole Source Justification	Sep 5, 2025
Synopsis for Protective Security Officer (PSO) services at IRS Facility, Andover, MA Limited / Sole Source Justification · FY25-00182	Jun 25, 2025
Protective Security Officer Services - IRS Andover MA Limited / Sole Source Justification	Jun 25, 2025
Explosive Detection Canine Team (EDCT) Services in Manhattan, NYC, NY and Bethesda, MD Solicitation	Apr 22, 2025
NYC, NY & Bethesda, MD Explosive Detection Canine Team (EDCT) Services Pre-Solicitation	Feb 28, 2025
NYC & DC Explosive Detection Canine Team (EDCT) Services Special Notice · 70RFPACQDIV1EDCT	Jan 31, 2025
NYC & DC Explosive Detection Canine Team (EDCT) Services Pre-Solicitation · 70RFP125RE2000007	Jan 30, 2025
Synopsis for Protective Security Officer (PSO) services at IRS Facility, Andover, MA Limited / Sole Source Justification · FY25-024	Dec 10, 2024

Contract awards and IDVs

Award	Awarded	Obligated
Explosive detection canine team (EDCT) services, manhattan, NYC, NY and bethesda, MD IDV · 70RFP126DE2000001 · Michael Stapleton Associates, LTD.	Feb 1, 2026	—
Explosive detection canine team (EDCT) services, manhattan, NYC, NY 70RFP126FRE200008 · Michael Stapleton Associates, LTD.	Feb 1, 2026	$303,748
Explosive detection canine team (EDCT) services, manhattan, NYC, NY 70RFP125FRE200024 · Michael Stapleton Associates, LTD.	Oct 1, 2025	$84,275
Protective security officer (PSO) services at the internal revenue service (IRS) facility in andover, massachusetts 70RFP126FRE100002 · Ahtna Integrated Services LLC	Jan 1, 2026	$3,695,700
PSO services - IRS brookhaven in holtsville, NY 70RFP125FRE200023 · GXC Inc.	Oct 1, 2025	$4,723,640
PSO services - IRS brookhaven in holtsville, NY IDV · 70RFP124DE2000001 · GXC Inc.	Dec 1, 2024	—
Explosive detection canine team (EDCT) services, manhattan, NYC, NY 70RFP122FRE200012 · Michael Stapleton Associates, LTD.	Oct 1, 2019	$248,187
Protective security officer (PSO) services for the IRS facility in andover, MA 70RFP125FRE100003 · Diversified Protection Corp	Jan 1, 2025	$2,278,819
Protective security officer (PSO) services for the IRS facility in andover, MA 70RFP123FRE100019 · Diversified Protection Corp	Oct 1, 2023	$3,329,418
Protective security officer (PSO) services for the IRS facility in andover, MA 70RFP124FRE100019 · Diversified Protection Corp	Oct 1, 2024	$1,130,269
Protective security officer (PSO) services for the IRS facility in andover, MA 70RFP125FRE100031 · Diversified Protection Corp	Oct 1, 2025	$1,224,136
Explosive detection canine team (EDCT) services, manhattan, NYC, NY IDV · 70RFP119DE2000003 · Michael Stapleton Associates, LTD.	Oct 1, 2019	—
Explosive detection canine team (EDCT) services, manhattan, NYC, NY 70RFP124FRE200042 · Michael Stapleton Associates, LTD.	Oct 1, 2024	$125,351
Protective security officer (PSO) services at the IRS brookhaven campus in holtsville, NY. 70RFP123FRE200003 · Diversified Protection Corp	Dec 1, 2018	$3,038,504
I/a/W the attached acquisition alert, task order#: 70RFP125FRE200008 falls within section 2(D) as a non-covered… Michael Stapleton Associates, LTD.	Apr 1, 2025	$132,483
Protective security officer (PSO) services for the IRS facility in andover, MA IDV · 70RFP119DE1000003 · Diversified Protection Corp	Jul 1, 2019	—
Protective security officer services (PSO) throughout the state of tennessee 244,292 hours * $43.39 70RFP125FRE400010 · Kerberos International, Inc.	Feb 1, 2025	$13,328,721
Protective security officer (PSO) services for the IRS facility in andover, MA 70RFP125FRE100019 · Diversified Protection Corp	Jul 1, 2025	$1,258,169
Armed protective security officer (PSO) services for the state of south carolina, section 2D 70RFP125FRE400016 · Bradley Technologies Inc.	Apr 1, 2025	$3,404,827
Protective security officer services at federal facilities throughout western massachusetts 70RFP122FRE100005 · North American Security, Incorporated	May 1, 2022	$1,473,102
Protective security officer (PSO) services throughout western massachusetts for the period of october 1, 2021 through… 70RFP121FRE100019 · North American Security, Incorporated	Sep 24, 2021	$1,590,171
Protective security officer services at federal facilities throughout connecticut 70RFP122FRE100004 · North American Security, Incorporated	May 1, 2022	$2,760,144
Protective security officer services - puerto rico / virgin islands 70RFP124FRE200009 · Triple Canopy Inc.	Mar 1, 2024	$8,375,868
Protective security officer (PSO) services in brooklyn, staten island and long island, new york 70RFP125FRE200004 · Alante Security Group, Inc.	Dec 1, 2024	$3,494,333
Protective security officer (PSO) services for the IRS facility in andover, MA 07/01/2023 - 09/30/2023 70RFP123FRE100009 · Diversified Protection Corp	Jul 1, 2023	$1,128,822

Show 15 more

Latest 25 of 37 listed here. See the rest on GovTribe.

Top vendors

Rank	Vendor	Awards and IDVs	Award value
1	Diversified Protection Corp	15	$27.5M
2	Michael Stapleton Associates, LTD.	7	$795K
3	North American Security, Incorporated	6	$7.59M
4	GXC Inc.	3	$5.6M
5	Paragon Systems Inc.	1	$1.07M
6	Kerberos International, Inc.	1	$11.3M
7	Alante Security Group, Inc.	1	$3.69M
8	Bradley Technologies Inc.	1	$3.4M
9	Ahtna Integrated Services LLC	1	$793K
10	Triple Canopy Inc.	1	$8.38M

Award value adds up the base and exercised options recorded for the contract awards naming them. IDVs carry no value of their own.

Top NAICS codes

Rank	NAICS code	SAM.gov records
1	561612 Security Guards and Patrol Services	45

Top PSC codes

Rank	PSC code	SAM.gov records
1	S206 Housekeeping- Guard	45

Quick answers

Who is Carly Diffenderfer?

Carly Diffenderfer is a federal contracting contact at Office of Procurement Operations (Department of Homeland Security). Point of contact on 8 SAM.gov notices and contracting staff on 31 contract awards and 6 IDVs, from October 30, 2024 to March 24, 2026.

How do I contact Carly Diffenderfer?

SAM.gov lists Carly Diffenderfer's email carly.diffenderfer@fps.dhs.gov and phone (267) 887-5709.

What is the latest SAM.gov notice naming Carly Diffenderfer?

Explosive Detection Canine Team (EDCT) Services in Manhattan, New York, limited / sole source justification, posted September 5, 2025.

Which vendors has Carly Diffenderfer awarded contracts to?

The vendors on the most contract awards and IDVs naming Carly Diffenderfer are Diversified Protection Corp, Michael Stapleton Associates, LTD. and North American Security, Incorporated. Carly Diffenderfer's contract awards to Diversified Protection Corp add up to $27.5M in base and exercised options.