Thanks, José and good morning everyone. Today, I'll cover second quarter financial results, including cash flow, liquidity and capital structure, as well as our increased full year 2017 guidance expectations. As Mark indicated at the beginning of the call, our discussion of financial metrics will include non-GAAP adjusted earnings and adjusted EBITDA. Reconciliation and details of all non-GAAP measures can be found on our press release on our website and in our SEC filings. Here is some summary comments regarding second quarter 2017 performance, which by virtually all financial measures represented the best quarterly performance in MasTec history. Second quarter 2017 revenue grew 53% to a record $1.89 billion, and this performance was significantly above our second quarter 2017 revenue expectation of $1.5 billion. The revenue growth over both last year's level and our quarterly expectation was driven by increased project activity in our oil and gas segment. Second quarter 2017 GAAP net income was $83.3 million or $0.99 per diluted share with both metrics representing record second quarter performance levels. Second quarter 2017 adjusted EBITDA was approximately $202 million, substantially above our guidance expectation. This level compares to $104 million for the second quarter of 2016 representing a 94% increase. On a rate basis, second quarter 2017 adjusted EBITDA was 10.7% of revenue. Second quarter 2017 adjusted EBITDA represented a record level of quarterly performance for MasTec. Second quarter 2017 adjusted diluted earnings were $1.03 per share, $0.38 per share above our guidance expectation. This record level compares to $0.36 per adjusted diluted share for the second quarter of 2016, an increase of $0.67 per share. The key driver for our second quarter results exceeding our guidance expectation was stronger oil and gas segment results. Additionally, we are pleased to see sequential improvement in our communications segment adjusted EBITDA margin rate during the quarter. Because of our strong second quarter performance, as well as our improved outlook, we are increasing our full year 2017 revenue guidance expectation to $6 billion. We are also increasing our full year 2017 adjusted EBITDA guidance expectation to $620 million or 10.3% of revenue, and increasing our full year 2017 adjusted diluted earnings guidance expectation to $2.73 per share. Now I will cover some segment detail regarding second quarter 2017 results. Oil and gas segment revenue increased approximately $715 million or 168% compared to the same period last year to approximately $1.14 billion. This level was significantly higher than our quarterly expectation due to both increased project activity and scope coupled with some acceleration of the expected second half 2017 project activity into the second quarter. Second quarter 2017 oil and gas segment adjusted EBITDA margin was 13.5% of revenue compared to 13.3% of revenue in the same period the prior year, and with this improvement coming from improved overhead utilization due to higher levels of revenue. Communications segment revenue was $592 million essentially flat when compared to last year's level. Second quarter 2017 communications segment adjusted EBITDA margin was 10.1% of revenue compared to 11.2% last year. On a sequential basis, adjusted EBITDA margin rate improved as expected by 140 basis points compared to the first quarter of 2017. As we indicated last quarter, we have been experiencing production and efficiencies in our installed home operations, as well as the negative leverage effect of reduced home security customer fulfillment activity and the exit of the customer phone delivery drop. As a result, first half 2017 adjusted EBITDA margin rates for this segment have been below last year's levels. We anticipate second half 2017 communications segment adjusted EBITDA margin rate comparisons versus 2016 will improve and approximate last year's second half rate levels. Electrical transmission segment results continue to perform as expected with second quarter 2017 adjusted EBITDA of approximately $4 million or 3.7% of revenue. As we have previously indicated, simply eliminating 2016 loss levels in this segment will drive sizeable improvement in our overall 2017 adjusted EBITDA when compared to 2016 and our first half 2017 results reflect a $38 million year-over-year adjusted EBITDA improvement over the same period into 2016. Year-to-date improvement aside, we continue to see 2017 as a transitional year for this segment with expected improvement in end market large project opportunities in 2018 and beyond. We are excited to report a 46% sequential increase in second quarter 2017 backlog for this segment and believe that backlog will increase further during the last half of 2017 setting this segment up for a strong 2018. Power generation and industrial segment revenue was $61 million, and while this was in-line with our guidance the expectation it was a $59 million decrease when compared to the same period last year. Adjusted EBITDA was approximately $5 million or 7.8% of revenue with strong project performance and execution offsetting the impact of lower revenue levels on overhead utilization. While we are seeing a good amount of renewable bidding activity that should benefit 2018, uncertainty regarding the potential value of production tax credits due to potential corporate tax reform has slowed 2017 in this segment. In our other segment during the second quarter of 2017 we recorded approximately $6 million in earnings related to our proportionate equity ownership in the two [indiscernible] pipelines which are now both in service and generating income. This income is included in the equity and earnings of unconsolidated affiliates line item on our income statement. On a go forward basis, we anticipate that this equity investment will generate approximately $20 million of annual income. Lastly, during the second quarter of 2017 our corporate segment reflected adjusted EBITDA costs of approximately $26 million or 1.4% of revenue. This includes a net expense of approximately $3 million related to reduced recovery expectations on both, a non-operating entity and the process of liquidation, as well as a long-term note receivable partially offset by reduced earn out obligation. To summarize, we had record second quarter 2017 performance with revenue increasing 53% and adjusted EBITDA increasing 94% over the same period last year. Our Top 10 largest customers in the second quarter as a percentage of revenue were; energy transfer affiliates was 47% reflecting the record level of second quarter oil and gas project activity on multiple projects. AT&T revenue derived from wireless and wireline services was approximately 14%, and installed to home and customer fulfillment security services were proximately 8%. On a combined basis, these four separate service offerings were approximately 22% of our total revenue. It is important to note that these offerings were falling under the AT&T corporate umbrella, are managed and budgeted independently within that organization giving us diversification within that corporate universe. Trans-Pecos pipeline was 5%, enterprise product partners, Comcast and Diamond pipeline were all 2%, and Duke Energy, American Electric Power, [indiscernible] and Next Hour Energy were all 1%. Individual construction projects comprised 69% of our second quarter 2017 revenue with master service agreements comprising 31% and this mix reflects the higher level of current large oil and gas project activity. We ended the quarter with backlog at approximately $5.3 billion, essentially flat when compared to the same period last year and as expected, sequentially lower due to the burn-off of the large oil and gas project activity. As we have previously indicated, we believe we are in the midst of a multi-year cycle of long haul project activity in the U.S. that will drive significant demand for future oil and gas services for several years, and we anticipate year end 2017 oil and gas backlog will once again approach or exceed our year end 2016 levels. Backlog highlights during the second quarter included sequential $300 million increase in the communication segments backlog; and lastly, but importantly, we also reported a 46% sequential increase in electrical transmission segment backlog during the quarter and we believe market conditions in this segment are favorable for continued backlog growth during the last half of the year. As we have said for years, it is important to consider that quarterly backlog amounts tend to be lumpy as large contracts burn-off each quarter and new large contract awards only come into backlog at a single point in time. Thus in a cycle with significant large project activity fluctuations in both quarterly backlog levels and historical quarterly revenue levels may occur simply due to timing shifts in the startup or production of large project activity. Regarding other areas of the income statement below the EBITDA line, second quarter 2017 depreciation amortization expense was approximately $45 million or 2.4% of revenue compared to 3.3% of revenue for the same period last year, with this decrease primarily due to higher revenue levels. Interest expense for the second quarter of 2017 was $14.8 million or 0.8% of revenue compared to 1% of revenue for the same period last year. This level was slightly higher than our quarterly expectation, primarily due to working capital usage related to financing our record level of second quarter revenue. Finally, second quarter 2017 adjusted diluted earnings were $1.03 per share, well above our adjusted diluted earnings of $0.36 per share for the same period last year. Now I will cover cash flow, liquidity and capital structure. As we have previously noted our long-term capital structure is solid with low interest rates and no significant near-term maturities, and we have an excellent and supportive bank group. We enter the third quarter with ample liquidity defined as cash possibility under our senior secured credit facility of approximately $400 million. During the second quarter we incurred increased revolver borrowing levels to fund the working capital requirements associated with approximately $730 million in sequential revenue growth. Our second quarter 2017 accounts receivable day sales outstanding or DSOs remain in excellent shape at 71 days, equal to the same period last year and remain slightly below our previously communicated expected DSO target range in the mid to high 70s. During the second quarter we also accelerated certain equipment purchases and on a year-to-date basis, we incurred approximately $110 million in new capital leases to support our equipment fleet needs. Thus our second quarter debt levels are elevated due to the acceleration of CapEx and the working capital requirements associated it with financing record levels of second quarter revenue. Inclusive of these investments our second quarter 2017 book leverage ratio defined as gross debt levels divided by trailing twelve month adjusted EBITDA was 2.1 times affording us sizeable financial flexibility and well within our stated leverage target range. That said, inclusive of the impact of third quarter acquisitions announced yesterday we anticipate that revenue seasonality coupled with lower levels of second half 2017 CapEx will reduce our current second quarter debt levels and year end 2017 debt levels will approximate our 2016 year end level with our 2017 year end book leverage ratio under two times. Regarding our outlook for full year 2017 spending on capital equipment, we dissipate cash CapEx defined as CapEx net of assets disposals to approximate $90 million and $155 million of equipment procured under capital leases. As of the second quarter of 2017, we have incurred approximately two-thirds of this annual expectation as we accelerated purchases during the second quarter to better support our operations. This capital level reflects our confidence based on our visibility of a continued multi-year cycle of large oil and gas project activity. With regard to our full year 2017 guidance expectation we're increasing our annual revenue expectation by $300 million to $6 billion largely based on expected increased levels of oil and gas long haul project activity. We are also increasing our annual adjusted EBITDA expectation by $45 million to $620 million or $10.3 million of annual revenue, and our expectation of adjusted diluted earnings per share by $0.28 to $2.73. In summary, our current second half 2017 revenue and adjusted EBITDA guidance expectation is very similar to our prior expectations after adjusting for the third quarter acquisitions announced yesterday and for the transfer of some oil and gas project activity out of the second half of 2017. We currently estimated that 2017 annual interest expense will approximate $60 million or 1% of annual revenue and that depreciation and amortization expense will approximate $186 million or 3.1% of annual revenue and these expectations incorporate both, accelerated levels of second quarter 2017 capital expenditure financing, as well as the impact of third quarter acquisitions. We currently estimate that our 2017 net income attributable to non-controlling interest will approximate $3 million. We also anticipate that our 2017 GAAP income tax rate will approximate 40% and our full year 2017 adjusted income tax rate will approximate 39%, with this difference due to the estimated tax effect of all adjusted items including the impact of share-based compensation. This expectation does not reflect any potential actions that may be taken by the U.S. government related to corporate tax reform, although depending on the nature and timing of such changes they could afford us with a significant cash flow and net income opportunity. Lastly, our share count for diluted earnings per share is about 82.5 million shares for both the third quarter and annual 2017 period, and this guidance expectations assumes no 2017 share repurchase activity. During the third quarter 2017 guidance we currently estimate that third quarter 2017 revenue will approximate $1.65 billion. Third quarter adjusted EBITDA is estimated to approximate $167 million or 10.1% of revenue. Lastly, adjusted diluted earnings per share estimated to be approximate $0.73 per share. Third quarter guidance includes the impact of the acceleration of some oil and gas segment project activity from the third quarter into the second quarter; and consistent with our prior guidance, continues to prudently assume moderated oil and gas segment adjusted EBITDA margin rates versus 2016 levels until we have better clarity of weather and other conditions associated with the expected significant level of project activity. In summary, we are proud of our record second quarter 2017 results and pleased to increase our full year 2017 guidance expectation to yet another record level. We have strong and visible opportunities across our end markets that support optimism for multiple years and our capital structure is in excellent shape leaving us well positioned to take advantage of the various opportunities our markets afford us. That concludes our prepared remarks, now we'll turn it back to the operator for questions and answers. Operator?