Former Executive Director of the America Petroleum Institute of South Carolina
Former Vice President of Government Affairs and Public Policy for the South Carolina Chamber of Commerce
Mark Harmon joined Cornerstone in December of 2024, expanding the firm's South Carolina office and solidifying our southern reach and capabilities.
Prior to joining Cornerstone, Mark served as Principal at The Harmon Consulting Group, LLC, where he provided contractual lobbying and consulting services by representing multiple clients before the legislative and executive branches of the South Carolina state government. Previously, Mark worked at Maynard Nexsen, PC, formerly Nexsen Pruet, LLC, as Government Affairs Advisor, also providing contractual lobbying and consulting services at the state level.
Before shifting to contract lobbying and consulting, Mark served as Executive Director of the America Petroleum Institute of South Carolina, advocating on behalf of the oil and natural gas industry before the state and federal government. In this role, he also coordinated with state agencies to ensure oil and natural gas operators were able to get products into high-demand areas during hurricanes and natural disasters. Additionally, Mark cultivated relationships with several of the state's Historically Black Colleges and Universities to promote STEM opportunities in oil and gas.
Prior to his work with the American Petroleum Institute, Mark served as the Vice President of Government Affairs and Public Policy for the South Carolina Chamber of Commerce. Harmon represented the state's business community and led an internal team responsible for generating the Chamber's public policy agenda, implementation strategy and social media outreach.
Before his time with the Chamber of Commerce, Mark served as the Executive Director of the South Carolina Senate Republican Caucus, where he organized campaigns, led ethics compliance and financial accounting and acted as liaison between Caucus supporters and senators to ensure all parties' interests were represented. As part of this role, Mark served as the day-to-day policy advisor to Senate Republican Caucus members and organized legislative session events and annual retreats for members and contributors. During his tenure, the Caucus gained seats and expanded its majority.
Mark received his Bachelor of Science in Ceramic and Materials Engineering from Clemson University.
511 Union Street, Suite 1820, Nashville, TN, 37219,
5) APOLLO INVESTMENT CONSULTING LLC
9) BOMBARDIER AEROSPACE CORPORATION
11) CHARTER COMMUNICATIONS, INC.
14) FACTSET RESEARCH SYSTEMS INC.
15) GOVERNMENTAL UTILITY SERVICES CORPORATION OF THE CITY OF ALICEVILLE
17) HANWHA Q CELLS AMERICA INC.
19) HOLGANIX INC.
20) HYDROSAT INC.
21) INNOVATE ALABAMA
22) INVENTORS DEFENSE ALLIANCE
25) MATROID INC.
26) MEDLINE
28) NATIONAL CENTER FOR MISSING AND EXPLOITED CHILDREN
29) NATIONAL THOROUGHBRED RACING ASSOCIATION
30) NAVAJO TRANSITIONAL ENERGY COMPANY, LLC
33) POWERSOUTH ENERGY COOPERATIVE
35) SAILDRONE, INC.
36) SBIR ADVISORS OBO ALEXANDRIA HOLDINGS LLC
37) SBIR ADVISORS OBO APPGATE CYBERSECURITY INC
38) SBIR ADVISORS OBO CIRCLE OPTICS INC
39) SBIR ADVISORS OBO COSMIC SHIELDING CORPORATION
40) SBIR ADVISORS OBO NETRISE INC
41) SBIR ADVISORS OBO PNI SENSOR CORPORATION
42) SBIR ADVISORS OBO SALTENNA LLC
43) SCIENCE AND ENGINEERING SERVICES, LLC
44) SECOND FRONT SYSTEMS, INC.
47) TRELLISWARE TECHNOLOGIES, INC.
50) UNITED LAUNCH ALLIANCE LLC
51) VAN SCOYOC ASSOCIATES, INC. OBO THE UNIVERSITY OF ALABAMA SYSTEM
52) VULNCHECK INC.
8033315075
1520 Main St Unit 2B, Columbia, SC, 29201,
2) Equifax Inc.
P.O. Box 625, Buda, TX, 78610,
2) APPLE INC.
5) BLACKSTONE ADMINISTRATIVE SERVICES PARTNERSHIPS L.P.
10) HILLWOOD DEVELOPMENT COMPANY, LLC
11) J C BAMFORD EXCAVATORS LTD.
12) JETZERO, INC.
14) MERCHANTS FOR AMERICA, INC.
303-519-5562
1660 Lincoln Street, Suite 2125, Denver, CO, 80264,
1) Alliance for Pharmacy Compounding
7) Colorado Soccer Association
9) CommuniCare Technology Inc.
10) Cornerstone Government Affairs
11) CRH Americas
12) Douglas County Sheriff's Office
14) Epiq Global
15) Generation Schools Network
16) GHGSat Inc.
19) Intuit
21) MxV Rail
22) National Parking Association
23) Neighborhood Development Collaborative
25) Recsol Recovery Solutions, LLC
26) Rocky Mountain Human Services
27) Sheet Metal and Air Conditioning Contractors' National Association Colorado Chapter
28) Slalom, Inc.
29) Solari
30) Southern Farm Bureau Casualty Insurance Company
31) Spectra Centers
720-626-4475
1660 Lincoln Street, Suite 2125, Denver, CO, 80238,
1) Alliance for Pharmacy Compounding
7) Colorado Soccer Association
8) Communicare
9) Cornerstone Government Affairs
10) CRH Americas
11) Douglas County Sheriff's Office
13) Epiq Global
14) Generation Schools Network
15) GHGSat Inc.
18) Intuit
19) Land O Lakes
20) MxV Rail
21) National Parking Association
22) Neighborhood Development Collaborative
24) Recsol Recovery Solutions, LLC
25) Rocky Mountain Human Services
26) Sheet Metal and Air Conditioning Contractors National Association-Colorado
27) Slalom, Inc.
28) Solari
29) Southern Farm Bureau Casualty Insurance Company
30) Spectra Centers
202-898-4797
1201 NY Ave. NW, Suite 900, Washington, DC, 20005,
2) AMERICAN INVESTMENT COUNCIL
3) BIOTECHNOLOGY INNOVATION ORGANIZATION
9) CONSUMER BRANDS ASSOCIATION
11) CTIA - THE WIRELESS ASSOCIATION
14) EHEALTH INSURANCE SERVICES, INC.
16) EVERYTOWN FOR GUN SAFETY ACTION FUND
17) FEDERATION OF AMERICAN HOSPITALS
19) GENERAL DYNAMICS
21) GUARDIAN LIFE INSURANCE COMPANY OF AMERICA
23) HILTON WORLDWIDE
24) HOLDINGS ACQUISITION CO., L.P.
25) MAPLEBEAR INC. D/B/A INSTACART
28) MIDWEST GAMING & ENTERTAINMENT, LLC
29) NATIONAL RURAL ELECTRIC COOPERATIVE ASSOCIATION
30) NOMURA HOLDING AMERICA INC.
31) PALANTIR TECHNOLOGIES, INC.
32) RELX INC.
34) RIVERS PORTSMOUTH GAMING, LLC
35) ROUNDABOUT THEATRE COMPANY INC.
38) SEMICONDUCTORS INDUSTRY ASSOCIATION
39) SUGARHOUSE HSP GAMING, L.P.
40) TECHNOLOGY NETWORK AKA TECHNET
44) VERIZON COMMUNICATIONS INC AND VARIOUS SUBSIDIARIES
45) VISA
900 16th St., NW, Washington, DC, 20006,
2) AMERICAN GAMING ASSOCIATION
3) AMERICAN INVESTMENT COUNCIL
5) BLOCK, INC.
8) EBAY INC.
9) ENTERTAINMENT SOFTWARE ASSOCIATION
P.O. Box 625, Buda, TX, 78610,
4) AMGEN, INC.
6) BLACKSTONE ADMINISTRATIVE SERVICES PARTNERSHIPS L.P.
8) BOTANICALS FOR BETTER HEALTH AND WELLNESS
9) BRISTOL-MYERS SQUIBB COMPANY
10) BROADCOM LIMITED
11) CAL-MAINE FOODS
12) COINBASE, INC.
14) COUPANG, INC.
15) ELECTRONIC PAYMENTS COALITION
19) GLOBAL MEDICAL RESPONSE, INC.
20) GOBRANDS, INC.
22) GRAIL LLC
24) ILLUMINA, INC.
25) INVENERGY LLC
26) NATIONAL ALLIANCE FOR CARE AT HOME
27) NCTA - THE INTERNET & TELEVISION ASSOCIATION
28) NEXUS HOSPICE OF THE HIGH DESERT LLC
30) OCHSNER HEALTH
31) PEPTIDE SCIENCES
33) PFIZER INC.
34) PHARMACEUTICAL RESEARCH AND MANUFACTURERS OF AMERICA
36) SPACE EXPLORATION TECHNOLOGIES CORP.
38) TIDES MEDICAL
39) ULTRAGENYX PHARMACEUTICAL INC.
40) UNITED STATES TENNIS ASSOCIATION
41) WELLHIVE
511 Union Street, Suite 1820, Nashville, TN, 37219,
2) AICPA ASSOCIATION OF INTERNATIONAL CERTIFIED PROFESSIONAL ACCOUNTANTS
4) AMERICAN CONSOLIDATED NATURAL RESOURCES OBO FORESIGHT ENERGY RESOURCES, LLC
6) APOLLO INVESTMENT CONSULTING LLC
10) BOMBARDIER AEROSPACE CORPORATION
12) CAPITAL ONE FINANCIAL CORPORATION
13) CHARTER COMMUNICATIONS, INC.
15) DUKE ENERGY BUSINESS SERVICES LLC
P.O. Box 625, Buda, TX, 78610,
1) A16Z CAPITAL MANAGEMENT (FORMERLY KNOWN AS AH CAPITAL MANAGEMENT, L.L.C.)
4) AMERICAN BANKERS ASSOCIATION
5) APPLE INC.
6) ASTRANIS SPACE TECHNOLOGIES CORP.
7) BLACKSTONE ADMINISTRATIVE SERVICES PARTNERSHIPS L.P.
10) DEEL
12) EBAY INC.
13) ELLIOTT INVESTMENT MANAGEMENT L.P.
15) FORIS DAX, INC. D/B/A CRYPTO.COM
17) GRAIL LLC
22) NUCLEAR ENERGY INSTITUTE, INC.
25) OPENAI
27) PALANTIR TECHNOLOGIES, INC.
29) PERFORMANCE DRONE WORKS, LLC
30) RISEPOINT
31) SHIELD AI
32) SIG SAUER, INC.
33) SOUTHERN COMPANY
34) SPACE EXPLORATION TECHNOLOGIES CORP.
35) STEPHENS SHARED SERVICES, LLC
37) THE MAJORITY GROUP ON BEHALF OF CONNECTED COMMERCE COUNCIL
511 Union Street, Suite 1820, Nashville, TN, 37219,
202-997-2400
507 Webb Street, Oxford, MS, 38655,
720-427-4120
1660 Lincoln St., Suite 2125, Denver, CO, 80264,
1) Alliance for Pharmacy Compounding
7) Colorado Soccer Association
8) CommuniCare Technology, Inc.
9) Cornerstone Government Affairs
10) CRH Americas
11) Douglas County Sheriff's Office
13) Epiq
14) Generation Schools Network
15) GHGSat Inc.
19) Intuit
21) MxV Rail
22) National Insurance Crime Bureau
23) National Parking Association
24) Neighborhood Development Collaborative
26) Recsol Recovery Solutions, LLC
27) Rocky Mountain Human Services
28) Sheet Metal and Air Conditioning Contractors' National Association Colorado Chapter
29) Slalom, Inc.
30) Solari Inc.
31) Southern Farm Bureau Casualty Insurance Company
32) Spectra Centers
P.O. Box 625, Buda, TX, 78610,
2) A16Z CAPITAL MANAGEMENT (FORMERLY KNOWN AS AH CAPITAL MANAGEMENT, L.L.C.)
6) AMERICAN BANKERS ASSOCIATION
7) ANHEUSER-BUSCH COMPANIES, LLC
8) APPLE INC.
9) BAUGHMAN KROUP BOSSE PLLC ON BEHALF OF GEMINI SPACE STATION, INC.
10) BLACKSTONE ADMINISTRATIVE SERVICES PARTNERSHIPS L.P.
11) BROADCOM LIMITED
12) CF SECURED LLC
13) DEEL
14) EBAY INC.
15) ELECTRONIC PAYMENTS COALITION
16) ELLIOTT INVESTMENT MANAGEMENT L.P.
18) FALCONX INC.
19) FINSECA
20) FMX
21) FORIS DAX, INC. D/B/A CRYPTO.COM
22) GBX GROUP LLC
24) GOBRANDS, INC.
25) GRAIL LLC
27) HILLWOOD DEVELOPMENT COMPANY, LLC
28) ID.ME, LLC
29) ILLUMINA, INC.
30) KALSHI, INC
31) MORGAN STANLEY
32) NASDAQ, INC.
33) NEPHRON NITRILE LLC (DBA AMERICAN ARMOR GLOVES)
35) OCCIDENTAL PETROLEUM CORPORATION
36) OGLE SCHOOL MANAGEMENT, LLC
38) PERSHING SQUARE CAPITAL MANAGEMENT, L.P.
39) PHARMACEUTICAL RESEARCH AND MANUFACTURERS OF AMERICA
42) SOUTHERN COMPANY
43) SPACE EXPLORATION TECHNOLOGIES CORP.
44) STRIPE, INC.
46) TRICOCI UNIVERSITY OF BEAUTY CULTURE, LLC
47) UNITED STATES TENNIS ASSOCIATION
49) WELLHIVE
202-434-8242
P.O. Box 625, Buda, TX, 78610,
2) A16Z CAPITAL MANAGEMENT (FORMERLY KNOWN AS AH CAPITAL MANAGEMENT, L.L.C.)
3) ACCIONA INFRASTRUCTURE USA CORP
10) ALZHEON, INC.
11) AM GENERAL LLC
12) AMERICAN BANKERS ASSOCIATION
13) AMGEN, INC.
14) ANHEUSER-BUSCH COMPANIES, LLC
15) APPLE INC.
17) ARCHER-DANIELS-MIDLAND COMPANY
18) ASHBRITT, INC.
20) ASTRANIS SPACE TECHNOLOGIES CORP.
22) AXALTA COATING SYSTEMS, LLC
23) BAUGHMAN KROUP BOSSE PLLC ON BEHALF OF GEMINI SPACE STATION, INC.
24) BLACKSTONE ADMINISTRATIVE SERVICES PARTNERSHIPS L.P.
26) BOTANICALS FOR BETTER HEALTH AND WELLNESS
27) BRISTOL-MYERS SQUIBB COMPANY
28) BROADCOM LIMITED
29) CAL-MAINE FOODS
31) CF SECURED LLC
32) CHARLES SCHWAB & CO., INC.
33) CINTAS
37) CORECIVIC, INC.
40) COUPANG, INC.
41) COVETRUS, INC.
42) CROSS COUNTRY HEALTHCARE, INC.
43) CRUISE LINES INTERNATIONAL ASSOCIATION, INC.
44) DEEL
46) DISCOVERY COMMUNICATIONS, LLC
47) EBAY INC.
48) ELECTRONIC PAYMENTS COALITION
49) ELLIOTT INVESTMENT MANAGEMENT L.P.
50) ENERGY TRANSFER PARTNERS, L.P.
51) ENGINE NO. 1 LP
52) ENVIVA, LLC
54) FALCONX INC.
55) FINSECA
57) FMX
58) FORIS DAX, INC. D/B/A CRYPTO.COM
59) GBX GROUP LLC
65) GLOBAL MEDICAL RESPONSE, INC.
66) GOBRANDS, INC.
68) GRAIL LLC
69) GREY ROCK NET ZERO OPPORTUNITIES FUND I, LP
70) GREYSTAR MANAGEMENT SERVICES, LLC
73) HEWLETT PACKARD ENTERPRISE ("HPE")
74) HILLWOOD DEVELOPMENT COMPANY, LLC
75) ILLUMINA, INC.
76) INVENERGY LLC
77) J C BAMFORD EXCAVATORS LTD.
78) JBS USA FOOD COMPANY HOLDINGS (FKA JBS USA FOOD COMPANY)
79) JETZERO, INC.
81) KALSHI, INC
82) KIRKLAND & ELLIS LLP ON BEHALF OF KIMBERLY-CLARK CORPORATION
83) KOCH GOVERNMENT AFFAIRS, LLC
87) MERCHANTS FOR AMERICA, INC.
88) MORGAN STANLEY
89) NAREIT
90) NASDAQ, INC.
91) NATIONAL ALLIANCE FOR CARE AT HOME
92) NATIONAL LAW ENFORCEMENT FOUNDATION
93) NCTA - THE INTERNET & TELEVISION ASSOCIATION
94) NEPHRON NITRILE LLC (DBA AMERICAN ARMOR GLOVES)
95) NEW MOUNTAIN CAPITAL, L.L.C.
97) NEXUS HOSPICE OF THE HIGH DESERT LLC
98) NIKE, INC.
99) NORFOLK SOUTHERN CORPORATION
100) NUCLEAR ENERGY INSTITUTE, INC.
101) NUCOR CORPORATION
102) NUSCALE POWER, LLC
103) OAK VIEW GROUP, LLC
104) OCCIDENTAL PETROLEUM CORPORATION
106) OCHSNER HEALTH
107) OGLE SCHOOL MANAGEMENT, LLC
108) ONONDAGA COUNTY
109) OPENAI
110) ORACLE AMERICA, INC.
111) PALANTIR TECHNOLOGIES, INC.
113) PAUL, WEISS LLP, ON BEHALF OF AD HOC GROUP OF MAJORITY MEMBER PREPA BONDHOLDERS
114) PEPTIDE SCIENCES
115) PERFORMANCE DRONE WORKS, LLC
116) PERNOD RICARD USA
117) PERSHING SQUARE CAPITAL MANAGEMENT, L.P.
118) PFIZER INC.
119) PHARMACEUTICAL RESEARCH AND MANUFACTURERS OF AMERICA
120) PLANET LABS PBC
121) PLAYPOWER, INC.
122) RED CHAMBER GROUP
123) REGATTA HCRP I LP
124) RISEPOINT
125) RTW INVESTMENTS, LP
128) SHIELD AI
129) SIBELCO NORTH AMERICA, INC.
130) SIG SAUER, INC.
131) SOFTBANK GROUP CORPORATION
132) SOUTHERN COMPANY
133) SPACE EXPLORATION TECHNOLOGIES CORP.
135) STEPHENS SHARED SERVICES, LLC
137) STRIPE, INC.
138) SUNSET LAKES WEST ASSOCIATES LLLP
139) SWEET OAK PARENT LLC
140) TEGNA INC.
143) THE MAJORITY GROUP ON BEHALF OF CONNECTED COMMERCE COUNCIL
145) THE UNITED COMPANY
146) TIDES MEDICAL
147) TILE COUNCIL OF NORTH AMERICA, INC.
148) TPT RESEARCH LLC
149) TRANSDIGM GROUP INC.
150) TRICOCI UNIVERSITY OF BEAUTY CULTURE, LLC
151) TWG CADILLAC FORMULA 1 TEAM HOLDINGS, LLC
152) TYPE ONE ENERGY GROUP, INC.
154) UBICQUIA, INC.
155) ULTRAGENYX PHARMACEUTICAL INC.
156) UNITED STATES TENNIS ASSOCIATION
157) VALERO ENERGY CORPORATION
159) WASTE CONNECTIONS US, INC.
160) WELLHIVE
(704) 994-3200
220 Lions Gate Drive, Cary, NC, 27518,
455 Massachusetts Ave., NW, Suite 1200, Washington, DC, 20001,
1) ABIR
3) ARCH CAPITAL GROUP (U.S.) INC.
4) ASSOCIATION FOR CONSUMER DEBT RELIEF(ACDR)
6) DUKE ENERGY BUSINESS SERVICES LLC
7) FINANCIAL TECHNOLOGY ASSOCIATION (FTA)
10) INSTITUTE FOR PORTFOLIO ALTERNATIVES (IPA)
11) INTERNATIONAL COUNCIL OF SHOPPING CENTERS, INC. DBA ICSC
12) INTUIT, INC. AND AFFILIATES
P.O. Box 625, Buda, TX, 78610,
2) ANHEUSER-BUSCH COMPANIES, LLC
7) CRUISE LINES INTERNATIONAL ASSOCIATION, INC.
8) DEEL
10) ELECTRONIC PAYMENTS COALITION
13) GRAIL LLC
15) HILLWOOD DEVELOPMENT COMPANY, LLC
16) ID.ME, LLC
17) JBS USA FOOD COMPANY HOLDINGS (FKA JBS USA FOOD COMPANY)
19) NATIONAL LAW ENFORCEMENT FOUNDATION
20) NCTA - THE INTERNET & TELEVISION ASSOCIATION
21) ONONDAGA COUNTY
22) OPENAI
24) PERFORMANCE DRONE WORKS, LLC
25) PHARMACEUTICAL RESEARCH AND MANUFACTURERS OF AMERICA
27) RISEPOINT
29) SPACE EXPLORATION TECHNOLOGIES CORP.
31) TILE COUNCIL OF NORTH AMERICA, INC.
32) UBICQUIA, INC.
(915)2271902
11900 Jollyville Rd, PMB No. 203832, Austin, TX, 78720,
914-255-0968
1660 Lincoln Street, Suite 2125, Denver, CO, 80264,
1) Alliance for Pharmacy Compounding
7) Colorado Soccer Association
8) CommuniCare Technology Inc.
9) Cornerstone Government Affairs
10) CRH Americas
11) Douglas County Sheriff's Office
13) Epiq Global
14) Generation Schools Network
15) GHGSat Inc.
18) Intuit
20) MxV Rail
21) National Parking Association
22) Neighborhood Development Collaborative
24) Recsol Recovery Solutions, LLC
25) Rocky Mountain Human Services
26) Sheet Metal and Air Conditioning Contractors' National Assoication Colorado Chapter
27) Slalom, Inc.
28) Solari
29) Southern Farm Bureau Casualty Insurance Company
30) Spectra Centers