Marcos Sonthay
											Associate
					                    
				
			            			
			
                        Heritage Plaza
1111 Bagby Street
Suite 2100
Houston, TX 77002
                				
				
			 	                    
								
							1111 Bagby Street
Suite 2100
Houston, TX 77002
marcos.sonthay@nelsonmullins.com
			Marcos focuses his practices on tax controversy and transactional tax matters. He has experience handling matters relating to tax issues and laws.
Marcos focuses his practices on tax controversy and transactional tax matters. He has experience handling matters relating to tax issues and laws.
Experience
                                            The following is a selected sampling of matters and is provided for informational purposes only. Past success does not indicate the likelihood of success in any future matter.
                                            
                                                                                                                                                Previous Professional Experience
- Law Clerk, national tax law firm (2021-2022)
- Law Clerk, Houston-based tax law firm (Jan. 2021-May 2021)
- Law Clerk, civil trial law firm (2020-2021)
Languages
- Spanish
Education
- 
												                                                	New York University School of Law,                                                
                                                                                                            LLM,                                                    
                                                                                                            Taxation                                                    
                                                    
                                                    
                                                                                                            (2022)
                                                    
																											
 - Research Assistant, Prof. David Elkins
 
- 
												                                                	University of Houston Law Center,                                                
                                                                                                            JD                                                    
                                                    
                                                    
                                                    
                                                                                                            (2021)
                                                    
																											
 - Board XXI Senior Articles editor, Houston Journal of Health Law and Policy
- President, Corporate and Tax Law Society (2020-2021)
 
- The University of Texas at Austin, BA, Government, Minor in History (2017)
Admissions
- Texas, 2022
- U.S. Tax Court
Clerkships
- Judicial Clerk, the Honorable Tamara W. Ashford, U.S. Tax Court (2022 - 2024)
- Judicial Intern, the Honorable Juan F. Vasquez Sr., U.S. Tax Court (May 2021 - Aug. 2021)
Practice Areas
                                                        The following is a selected sampling of matters and is provided for informational purposes only. Past success does not indicate the likelihood of success in any future matter.
			                                            
			                                        			                                            			                                                Previous Professional Experience
- Law Clerk, national tax law firm (2021-2022)
- Law Clerk, Houston-based tax law firm (Jan. 2021-May 2021)
- Law Clerk, civil trial law firm (2020-2021)
Languages
- Spanish
Recognitions
                                        The bar rules of some states require that the standards for an attorney's inclusion in certain public accolades or recognitions be provided.  When such accolades or recognitions are listed, a hyperlink is provided that leads to a description of the respective selection methodology. 
                                        
                                        
                                - Best Lawyers in America® Ones to Watch
	- Tax Law (2026)
- Mergers & Acquisitions Law (2026)
- Litigation and Controversy - Tax (2026)
 
Marcos focuses his practices on tax controversy and transactional tax matters. He has experience handling matters relating to tax issues and laws.
Experience
The following is a selected sampling of matters and is provided for informational purposes only. Past success does not indicate the likelihood of success in any future matter.Previous Professional Experience
- Law Clerk, national tax law firm (2021-2022)
- Law Clerk, Houston-based tax law firm (Jan. 2021-May 2021)
- Law Clerk, civil trial law firm (2020-2021)
Languages
- Spanish
Education
- 
                                                                                                            New York University School of Law,                                                    
                                                                                                            LLM,                                                    
                                                                                                            Taxation                                                    
                                                    
                                                    
                                                                                                            (2022)
                                                    
																											
 - Research Assistant, Prof. David Elkins
 
- 
                                                                                                            University of Houston Law Center,                                                    
                                                                                                            JD                                                    
                                                    
                                                    
                                                    
                                                                                                            (2021)
                                                    
																											
 - Board XXI Senior Articles editor, Houston Journal of Health Law and Policy
- President, Corporate and Tax Law Society (2020-2021)
 
- The University of Texas at Austin, BA, Government, Minor in History (2017)
Admissions
- Texas, 2022
- U.S. Tax Court
Clerkships
- Judicial Clerk, The Honorable Tamara W. Ashford, U.S. Tax Court (2022 - 2024)
- Judicial Intern, The Honorable Juan F. Vasquez Sr., U.S. Tax Court (May 2021 - Aug. 2021)
Practice Areas
                                            The bar rules of some states require that the standards for an attorney's inclusion in certain public accolades or recognitions be provided.  When such accolades or recognitions are listed, a hyperlink is provided that leads to a description of the respective selection methodology. 
                                            
                                            
                                    - Best Lawyers in America® Ones to Watch
	- Tax Law (2026)
- Mergers & Acquisitions Law (2026)
- Litigation and Controversy - Tax (2026)
 
Highlights from the Firm’s Insights
 
                                            						
						
						
															
                                                        NMRS Attorneys Published in Florida Bar Journal on CCNA Procurements
                                                        
                            
							
					
																	November/December 2025
															
						 
                                            						
						
						
															
                                                        “Prime Equity” and the NIL Era: Shedeur Sanders’ Contract Ushers...
                                                        
                            
							
					
																	September 3, 2025
															
						 
                                            						
						
						
															
                                                        Old North State Report – October 27, 2025
                                                        
                            
							
					
																	October 28, 2025
															
						
 
				 
					
 
                                            						
						
						