EX-31
Rule 13a-14(d)/15d-14(d) Certifications.





I,
Nicholas Galeone, certify that:



1. I
have reviewed this report on Form 10-K and all reports on Form 10-D required to
be filed in respect of the period covered by this report on Form 10-K of the
UBS Commercial Mortgage Trust 2019-C18 (the "Exchange Act periodic
reports");



2.
Based on my knowledge, the Exchange Act periodic reports, taken as a whole, do
not contain any untrue statement of a material fact or omit to state a material
fact necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period
covered by this report;



3.
Based on my knowledge, all of the distribution, servicing and other information
required to be provided under Form 10-D for the period covered by this report
is included in the Exchange Act periodic reports;



4.
Based on my knowledge and the servicer compliance statements required in this
report under Item 1123 of Regulation AB, and except as disclosed in the
Exchange Act periodic reports, the servicers have fulfilled their obligations
under the servicing agreements in all material respects; and



5. All
of the reports on assessment of compliance with servicing criteria for
asset-backed securities and their related attestation reports on assessment of
compliance with servicing criteria for asset-backed securities required to be
included in this report in accordance with Item 1122 of Regulation AB and
Exchange Act Rules 13a-18 and 15d-18 have been included as an exhibit to this
report, except as otherwise disclosed in this report. Any material instances of
noncompliance described in such reports have been disclosed in this report on
Form 10-K.



In
giving the certifications above, I have reasonably relied on information
provided to me by the following unaffiliated parties:



Wells
Fargo Bank, National Association, as Master Servicer, Rialto Capital Advisors,
LLC, as Special Servicer, Wilmington Trust, National Association, as Trustee,
Wells Fargo Bank, National Association, as Certificate Administrator, Wells
Fargo Bank, National Association, as Custodian, Park Bridge Lender Services
LLC, as Operating Advisor, CoreLogic Solutions, LLC, as Servicing Function
Participant, Computershare Trust Company, National Association, as Servicing
Function Participant for the Certificate Administrator, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian, Midland Loan Services, a Division of PNC Bank, National Association,
as Primary Servicer for the 3 Columbus Circle Mortgage Loan, LNR Partners, LLC,
as Special Servicer for the 3 Columbus Circle Mortgage Loan, Wells Fargo Bank,
National Association, as Trustee for the 3 Columbus Circle Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the 3 Columbus Circle
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the 3
Columbus Circle Mortgage Loan, Computershare Trust Company, National
Association, as Servicing Function Participant for the Custodian for the 3
Columbus Circle Mortgage Loan, Wells Fargo Bank, National Association, as
Primary Servicer for the Century Plaza Towers Mortgage Loan, CWCapital Asset
Management LLC, as Special Servicer for the Century Plaza Towers Mortgage Loan,
Wilmington Trust, National Association, as Trustee for the Century Plaza Towers
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
Century Plaza Towers Mortgage Loan, CoreLogic Solutions, LLC, as Servicing
Function Participant for the Century Plaza Towers Mortgage Loan, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Custodian for the Century Plaza Towers Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the 225
Bush Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Special Servicer for the 225 Bush Mortgage Loan, Wells Fargo
Bank, National Association, as Trustee for the 225 Bush Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the 225 Bush Mortgage Loan,
Pentalpha Surveillance LLC, as Operating Advisor for the 225 Bush Mortgage
Loan, Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the 225 Bush Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the ILPT Industrial Portfolio
Mortgage Loan, Situs Holdings, LLC, as Special Servicer for the ILPT Industrial
Portfolio Mortgage Loan, Wilmington Trust, National Association, as Trustee for
the ILPT Industrial Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the ILPT Industrial Portfolio Mortgage Loan, Park
Bridge Lender Services LLC, as Operating Advisor for the ILPT Industrial
Portfolio Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function
Participant for the ILPT Industrial Portfolio Mortgage Loan, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Custodian for the ILPT Industrial Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the Global Payments, Inc.
Mortgage Loan, Argentic Services Company LP, as Special Servicer for the Global
Payments, Inc. Mortgage Loan, Wilmington Trust, National Association, as
Trustee for the Global Payments, Inc. Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Global Payments, Inc. Mortgage Loan, Park
Bridge Lender Services LLC, as Operating Advisor for the Global Payments, Inc.
Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function Participant for
the Global Payments, Inc. Mortgage Loan, Computershare Trust Company, National
Association, as Servicing Function Participant for the Custodian for the Global
Payments, Inc. Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Primary Servicer for the Crimson Retail Portfolio
Mortgage Loan, Rialto Capital Advisors, LLC, as Special Servicer for the
Crimson Retail Portfolio Mortgage Loan, Wells Fargo Bank, National Association,
as Trustee for the Crimson Retail Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Crimson Retail Portfolio Mortgage
Loan, Pentalpha Surveillance LLC, as Operating Advisor for the Crimson Retail
Portfolio Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the Crimson Retail Portfolio
Mortgage Loan, Wells Fargo Bank, National Association, as Primary Servicer for
the Shoppes at Parma Mortgage Loan, LNR Partners, LLC, as Special Servicer for
the Shoppes at Parma Mortgage Loan, Wilmington Trust, National Association, as
Trustee for the Shoppes at Parma Mortgage Loan, Citibank, N.A., as Custodian
for the Shoppes at Parma Mortgage Loan, Pentalpha Surveillance LLC, as
Operating Advisor for the Shoppes at Parma Mortgage Loan, CoreLogic Solutions,
LLC, as Servicing Function Participant for the Shoppes at Parma Mortgage Loan,
U.S. Bank National Association, as Servicing Function Participant for the
Shoppes at Parma Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Primary Servicer for the Airport Square Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer for the Airport Square Mortgage Loan prior to April 27, 2023, K-Star
Asset Management LLC, as Special Servicer for the Airport Square Mortgage Loan
on and after April 27, 2023, Wells Fargo Bank, National Association, as Trustee
for the Airport Square Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the Airport Square Mortgage Loan, Park Bridge Lender Services
LLC, as Operating Advisor for the Airport Square Mortgage Loan, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Custodian for the Airport Square Mortgage Loan, Wells Fargo Bank, National
Association, as Primary Servicer for the DoubleTree New York Times Square West
Leased Fee Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the DoubleTree New York Times
Square West Leased Fee Mortgage Loan, Wilmington Trust, National Association, as
Trustee for the DoubleTree New York Times Square West Leased Fee Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the DoubleTree New
York Times Square West Leased Fee Mortgage Loan, Pentalpha Surveillance LLC, as
Operating Advisor for the DoubleTree New York Times Square West Leased Fee
Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function Participant for
the DoubleTree New York Times Square West Leased Fee Mortgage Loan, and
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian of theDoubleTree New York Times
Square West Leased Fee Mortgage Loan.





Dated: March 15, 2024





/s/
Nicholas Galeone

Nicholas
Galeone

President

(senior
officer in charge of securitization of the depositor)