Aaron Darden
President/Chief Executive Officer

Mr. Darden joined THA in May of 2017 after nearly a decade at the Metropolitan Development and Housing Agency (MDHA) in Nashville, TN. At MDHA he served in several leadership roles including public housing property manager, COO of Affordable Housing and Director of Recapitalization. His efforts at MDHA helped them achieve “High Performer” status from HUD. Mr. Darden holds an MBA in MIS and a BA in Social Work.

Matthew Letzig
Chief Operating Officer

Mr. Letzig joined THA in May 2003 as an Accountant I and progressed up through THA’s Finance and Accounting department. He held the position of Assistant Controller from 2007 to 2014 and Controller from 2014 to 2016. Mr. Letzig earned his Bachelor’s Degree from Oklahoma State University and currently serves as the Vice President for the Housing Authority of the City of Tulsa. After serving as Interim President/Chief Executive officer since August 2016, Mr. Letzig was promoted to Chief Operating Officer in May 2017.

Darian Walker

Mrs. Walker joined THA in November of 2010.  Before coming to THA, she spent over eight years with the Community Food Bank of Eastern Oklahoma (CFBEO) as the Director of Administration.  In her role as Director of Administration, she oversaw all aspects of finance and administration, maintained the contract to distribute USDA commodities for the State of Oklahoma and served a leadership role during the Donald W. Reynold’s grant application process (which was awarded and a new facility was constructed in 2006).

Terri Cole
Vice President – Vice President of Rental Assistance

Ms. Cole has been Vice President of Rental Assistance since February 2006.  Ms. Cole began her career at THA as a Leasing Agent, progressing through various positions, including Assistant Director of Assisted Housing immediately prior to her promotion to Vice President.  Ms. Cole has maintained the HUD High Performer SEMAP rating for the Housing Choice Voucher Program during her tenure.  She holds an Associate’s Degree in Business and an number of professional certifications in the housing field.  Ms. Cole is a past President of OKNAHRO and currently co-chairs the Members Services Committee for OKNAHRO.

Kent Keith
Vice President – Construction Services

Mr. Keith joined the Housing Authority of the City of Tulsa as a Contract Coordinator in 2010 and was named Vice President of Construction Services in 2011. He brings to THA over 20 years of construction management experience as a licensed general contractor and real estate developer. During his career, he has completed over $600,000,000 in construction projects that range from production and custom homes to commercial improvements and development. Mr. Keith earned a Bachelors Degree in Architectural Studies from the University of Kansas, School of Architecture and Urban Design.

Steve King
Vice President – IT

Mr. King began his career at the Housing Authority of the City of Tulsa in 1991 as a Computer Operator. He has been Vice President of MIS since 1993. He holds a Bachelor’s Degree from Oklahoma State University in Management Information Systems. Mr. King has spoken about technology and HUD systems at OK NAHRO, National NAHRO, and OATHA Conferences. Mr. King is a past board member, and current President of the Organization for the Advancement of Technology in Housing Agencies (OATHA).

Vickie Williams
Vice President – Human Resources

Ms. Williams joined the THA staff in 2002 and has over 30 years of experience in the Human Resources field.  She has a Bachelors Degree in Business Management and has been certified as a Senior Professional in Human Resources (SPHR) through the Society of Human Resources Manager (SHRM).  She has been an active member of SHRM since 1993.

Ruth Martin
General Counsel

Ruth Addison Martin serves as the General Counsel for the Housing Authority of the City of Tulsa.  Mrs. Martin attended Oral Roberts University and finished in December 2003. She then attended the University of Oklahoma College of Law. While in law school, Mrs. Martin worked for two federal bankruptcy judges as well as the Oklahoma Criminal Court of Appeals.  At 21, she graduated in May 2007. Mrs. Martin served as an Assistant District Attorney in Tulsa County for three years and then decided to enter private practice as a trial lawyer.  She regularly represented individuals and business entities in criminal defense, compliance, and investigation matters.  She also assisted employers in state and federal court on labor and employment matters related to allegations of discrimination, retaliation, harassment, covenants-not-to-compete, confidentiality, nondisclosure agreements, wage and hour disputes, and other workplace issues. She also represented professionals in administrative hearings in front of the Oklahoma Medical Board, Oklahoma Board of Pharmacy, State Board of Behavioral Health, and the Oklahoma Health Care Authority. Mrs. Martin was routinely recognized as an Oklahoma Super Lawyer Rising Star in White Collar Defense as well as Professional Negligence.

Gary Kammer
Vice President – Community Development

Mr. Kammer comes to Tulsa Housing Authority with over 15 years of experience in both multi and single-family housing development with extensive experience in Low Income Housing Tax Credits and various other housing financing programs. He has underwritten over $300 million in acquisitions and $600 million of new development nationwide. He is often involved in multiple community endeavors such as Kids Matter International and is always open to hearing about new opportunities. Mr. Kammer holds a degree in Public Administration and an MBA from Pepperdine University.

Art Waller
Vice President / Affordable Housing

Art Waller joined THA in July 2017. He previously served as the Director of the Housing Choice Voucher Program at the Housing Authority of New Orleans, and held similar positions in various cities in Virginia, Texas, and Southern California. Originally from St. Louis, MO, Art holds an Associate’s Degree in Business Administration from Lancaster Community College, a Bachelor’s Degree in Applied Arts and Sciences from the University of North Texas, and a number of professional certifications in the fields of housing and community development.