718-824-1616 info@certifiedtestinglabs.com Mon-Fri: 7am to 5pm
718-824-1616 info@certifiedtestinglabs.com Mon-Fri: 7am to 5pm



Non-Destructive Testing (NDT)

  • RT – X-Ray / Industrial Radiography
  • UT – Ultrasonic Testing
  • MT – Magnetic Particle Testing
  • PT – Dye Penetrant Testing
  • VT – Visual Testing
  • Welder Qualification Testing
  • CWI – Visual Inspection
  • Half Cell Testing
  • Structural Steel inspection
  • Reinforcing

Special Inspections

  • Wall Panels, Curtain Walls & Veneers
  • Exterior Insulation Finish Systems
  • Chimneys
  • Flood Zone Compliance
  • Luminous Egress Path Markings


  • Footing inspection-bearing capacity
  • Stabilized sub-grade inspection-Proofroll
  • Controlled fill-compaction testing
  • Materials-quantity verification inspection
  • California bearing ratio(CBR) field
  • Material sampling
  • Soil borings/Test pits
  • Pile driving
  • Sprayed Fire-Resistant Materials
  • Mastic & Intumescent Fire-Resistant Coatings
  • Smoke Control Systems
  • Sprinkler Systems
  • Standpipe Systems
  • Fire-Resistant Penetrations & Joints
  • Emergency & Standby Power Systems
  • Mechanical Systems
  • Fuel-Oil Storage & Piping Systems
  • Heating Systems
  • Soil Percolation Test – Drainage Disposal Systems
  • On-Site Storm Water Drainage Systems
  • On-Site Sewage Disposal System Installation
  • Soil Percolation Test – Sewage Disposal Systems
  • Ultrasonic Inspection
  • Magnetic Particle Inspection
  • Liquid Dye Penetrant Inspection
  • Industrial Radiographic Inspection
  • High-Strength Bolting
  • Metal Decking
  • Shop/Field Welds
  • Structural Cold-Formed Steel
  • High Temperature Hot Water Piping-Welding
  • High Pressure Steam Piping-Welding
  • High Pressure Fuel Gas Piping-Welding
  • Aluminum Welding
  • Concrete Precast
  • Prestressed Concrete
  • Masonry
  • Subsurface Conditions-Subgrade Inspection
  • Subsurface Conditions-Fill Placement & In-Place Density
  • Subsurface Investigations
  • Deep Foundation Elements
  • Helical Piles
  • Vertical Masonry Foundation Elements
  • Structural Stability-Existing Buildings
  • Excavations/Sheeting/Shoring/bracing
  • Underpinning
  • Mechanical Demolition
  • Raising & Moving of Buildings
  • Seismic Isolation Systems
  • Post Installed Anchors
  • Footing and Foundation
  • Lowest Floor Elevation
  • Structural Wood Frame Inspection
  • Fire-Resistance Rated Construction
  • Energy Code Compliance
  • Public Assembly Emergency Lighting

Construction Materials Testing (CMT)

  • Organic content
  • Hydrometer
  • Sieve analysis
  • Atterberg limits
  • Soil classification
  • Moisture density relations of soils-standard proctor
  • Specific Gravity
  • pH value
  • Moisture content
  • Absorption
  • Permeability
  • Permeability class rating-dep
  • Hydraulic Conductivity
  • Los Angeles abrasion and impact test
  • California bearing ratio (CBR)-lab
  • Soundness of aggregates
  • Resistivity
  • Compaction testing
  • Diamond core drilling/sampling
  • Batch plant inspection
  • Relative density
  • Percent air voids
  • Extraction of bitumin
  • Density
  • Thickness
  • Maximum theoretical gravity(rice method)
  • Field testing/inspection
  • Batch plant inspection
  • Floor flatness
  • Diamond core drilling/sampling
  • Pull/load testing
  • Windsor probe
  • Swiss hammer
  • Moisture vapor emission rate
  • Compressive strength
  • Flexural strength
  • Chloride ion penetration
  • Unit weight
  • Fire Rating of concrete masonry units
  • Absorption of concrete masonry units
  • Modulas of elasticity

Spray on Fireproofing-Field

  • Thickness
  • Bond strength

Spray on Fireproofing-Laboratory

  • Density

Door & Frame Fire Rating
Fire Stopping Inspection



Calisto Bertin - President

Calisto Bertin is a licensed professional engineer with over 40 years of experience in engineering design and construction oversight of civil and structural projects in the northeastern United States.  He has also designed projects and prepared engineering studies in Ontario, Canada and Abu Dhabi, UAE.


Mr. Bertin’s introduction to concrete began at a very young age working in the family concrete and masonry business where Calisto gained over a decade of experience mixing mortar, cement and concrete for construction projects.  After earning his engineering degrees, in 1978, he became a construction engineer for Westvaco Corporation, an industrial paper manufacturer where he oversaw the construction and quality control of concrete and steel structures including power plant turbine generator replacements.  This included concrete field testing similar to that of an ACI-Grade 1 Technician, and concrete construction Special Inspector.

In 1980, Mr. Bertin joined Exxon Company, USA where he served as a project engineer managing the construction of bulk and retail petroleum facilities.  After obtaining his professional engineering license in 1984, Calisto moved into design consulting, first working for a small firm; and then opening Bertin Engineering in 1986.  For over 30 years he serves as the chief civil and structural engineer designing commercial and residential developments.  His experience in concrete design includes retaining walls, culverts, specialty foundations and low-rise buildings.  He also performs the evaluation of structures, the forensic investigation of failed structures, and the development of rehabilitation programs to restore structures.

In 1998, while maintaining his role at Bertin Engineering, Mr. Bertin acquired and continues to serve as the chairman of Johnson Soils Company, a geotechnical engineering and testing company.  It also performs the design of deep and shallow foundations.  He expanded their services to include Special Inspection of concrete reinforcing, and field concrete testing and placement.

In 2020, Mr. Bertin performed the design and oversaw the construction and AASHTO accreditation of a concrete testing lab for C&L Construction Testing.


Villanova University, Villanova, PA                            B.C.E. – Civil Engineering

Rensselaer Polytechnic Institute, Troy, NY                M.S. – Civil Engineering


American Society of Civil Engineers

National Society of Professional Engineers


New York, New Jersey, Connecticut, Massachusetts, New Hampshire and Rhode Island

Kirt Dobbins - Professional Engineer and Director, Bronx

Mr. Dobbins is a Professional Engineer and certified in NY, NJ and PA. He joined CTL in 2013 and oversees all technical aspects of operations at the Bronx Branch. Prior to joining CTL he served as a Structural Engineer at Linde Engineering North America. His experience spans Project Management, Engineering, Construction Management and Product Development. He has an MS in Environmental Technology from the New York Institute of Technology and a BS in Civil Engineering from Northeastern University in Boston.

Darryl Schultz - RSO Bordentown and Bronx

Darryl Schultz is the Non-Destructive Testing (NDT) Manager and Radiation Safety Officer (RSO) at CTL’s Bordentown, NJ facility. Darryl has been CTL’s RSO for the last fourteen years and has over twenty-eight years of NDT experience.  He is responsible for supervising all NDT personnel, radiation safety training, the implementation of CTL’S radiation safety program, and the maintenance and calibrations of surveying and monitoring equipment. Darryl has been with CTL since 1996 and holds current certifications with AWS (American Welding Society) as a CWI (Certified Welding Inspector) and CRI (Certified Radiographic Interpreter), ASNT (American Society of Non-Destructive Testing) as a Level III in Visual Testing (VT), Magnetic Particle Testing (MT), and Penetrant Testing (PT), ICC (International Code Council) as a Structural Steel, Bolting and Welding inspector and is trained in Radiation Safety & Hazmat.

Maureen McLennon - Chief Operating Officer

Maureen McLennon is the Chief Operating Officer (COO) for Certified Testing Labs, Inc.   She is a CPA with over 25 years of experience.  Maureen is responsible for Bronx operations and corporate financials. Maureen joined CTL in 2018.